目录
[information question](#information question)
[Yes/No question](#Yes/No question)
[After ...之后，时间副词子句](#After ...之后，时间副词子句)
[Although / though 虽然，让步副词子句](#Although / though 虽然，让步副词子句)
[As 正如，如同](#As 正如，如同)
[As 当...时](#As 当...时)
[As 因为，原因副词子句](#As 因为，原因副词子句)
[As... as 比较副词子句， 修饰限定词many](#As... as 比较副词子句， 修饰限定词many)
[As far as 程度副词](#As far as 程度副词)
[As if 好像](#As if 好像)
[As long as 只要，条件副词子句](#As long as 只要，条件副词子句)
[Because 因为， 原因副词子句](#Because 因为， 原因副词子句)
[Before ...之前，时间副词子句](#Before ...之前，时间副词子句)
[For 因为，原因副词子句](#For 因为，原因副词子句)
[For fear that 唯恐](#For fear that 唯恐)
[If 如果，条件副词子句](#If 如果，条件副词子句)
[In case 万一，目的副词子句](#In case 万一，目的副词子句)
[In order that 目的是，目的副词子句](#In order that 目的是，目的副词子句)
[In that 意思是说，用做解说的副词子句](#In that 意思是说，用做解说的副词子句)
[No matter 不论，条件副词子句](#No matter 不论，条件副词子句)
[No sooner... than 刚一... 就...，比较级连接词，时间副词子句](#No sooner... than 刚一... 就...，比较级连接词，时间副词子句)
[Now that 既然，原因副词子句](#Now that 既然，原因副词子句)
[On condition that 条件是](#On condition that 条件是)
[Only that 只不过，让步副词子句](#Only that 只不过，让步副词子句)
[Lest 以免](#Lest 以免)
[Since 自从](#Since 自从)
[Since 既然](#Since 既然)
[So that 结果](#So that 结果)
[So that 目的是](#So that 目的是)
[So... that 引导的副词子句修饰形容词或副词](#So... that 引导的副词子句修饰形容词或副词)
[Such... that 引导的副词子句修饰名词](#Such... that 引导的副词子句修饰名词)
[Suppose 条件副词子句，假设](#Suppose 条件副词子句，假设)
[Than 比较级连接词，引导的副词子句修饰限定词more来做比较](#Than 比较级连接词，引导的副词子句修饰限定词more来做比较)
[Thereby 因此，结果副词子句](#Thereby 因此，结果副词子句)
[Until 时间副词子句](#Until 时间副词子句)
[When 时间副词子句](#When 时间副词子句)
[Where 地方副词子句](#Where 地方副词子句)
[While 时间副词子句：当...时](#While 时间副词子句：当...时)
[While 条件副词子句：虽然](#While 条件副词子句：虽然)
[Whether 与 Wh-ever](#Whether 与 Wh-ever)
句型
因为一句话，类似 Be ever so humble , there is no place like home. 所以看了句型的语法，但是真是记不住，记录一下，以后遇到看不懂的就检索一下吧。
书里的例子蛮多的，就是解析需要耐下心来好好看~~
倒装句
特点：动词在前，主词在后
动词要移到主词前面构成倒装，通常得先有别的元素为了某种修辞原因移动到句首，动词只不过是被它带着走
作用：加强语气，且增加上下文的连贯性
倒装方式
直接移动动词
受词倒装：引用句
S + V + O句型中，受词部分如果是个引用句，可以选择把受词倒装到句首。动词部分可倒装也可不倒装，如果倒装就是把整组动词移动到主词前面。
直接引用句（有双引号）
原句：
The weatherman says, "The typhoon is expected to swerve north for Japan."
气象预报员说："台风预期将偏北转往日本。"
倒装句：
"The typhoon is expected to swerve north for Japan**,"**says the weatherman. / the weatherman says.
间接引用句（无双引号）
原句：
The weatherman says that the typhoon is expected to swerve north for Japan.
倒装句：
The typhoon is expected to swerve north for Japan, says the weatherman. / , the weatherman says.
the weatherman says / says the weatherman 作为插入语使用
不倒装：
The typhoon , the weatherman says, is expected to swerve north for Japan.
倒装：
The typhoon, says the weatherman, is expected to swerve north for Japan.
引用句是否倒装的修辞考量 （要提前的部分是否需要被强调）
原句：
Green Peace, a small but vociferous organization dedicated to environment protection by any means possible, warns that whale hunting will not be tolerated.
绿色和平，一个规模虽小但声音很大胆的组织、致力以一切手段保护环境，警告说捕鲸将不被容忍。
句子的重点在于"whale hunting will not be tolerated", 被放到最后，得不到应有的强调，应该++提前，但不倒装++
Whale hunting will not be tolerated , Green Peace , a small but vociferous organization dedicated to environment protection by any means possible, warns.
第二个句子主词Green Peace 和动词warns中间隔了很长的同位格，而且动词和受词之间又隔了更长的距离，造成句子不清楚，此时选倒装，动词跟着受词一同移到主词前面
倒装句：
Whale hunting will not be tolerated, warns Green Peace, a small but vociferous organization dedicated to environmental protection by any means possible.
补语倒装: 地方副词、形容词
补语移至句首，动词跟着移动到主词前面。
地方副词补语倒装
There is / are句型
倒装句：
There is a book on the desk.
原句：
A book is there on the desk.
倒装句：Here comes the parade. 游行队伍走过来了。(Here 地点副词移到句首加强语气)
原句：
The parade comes here.
倒装句:Away flew the bird. 鸟飞走了（away 地方副词移到句首加强语气）
原句：
The bird flew away.
增强句子的连贯性：Across the street stood the drugstore. Next to the drugstore is a large park. In the park dwell dozens of ground squirrels. 街对面就是药房。药房旁边有个大公园。公园里头住着几十只地面松鼠。
（地方副词移动到句首，动词放在主词前面，句子连贯性比较好）
C 类似 there is / are 构造的关系子句
关系子句句型符合 there is / are句型，可倒装
The Amazon is a pristine river. 亚马逊是条原始河流。
The deadly piranha roam in that river. 致命的食人鱼在那条河中漫游。
改写为关系子句 两句在名词river上重复而建立关系，
将句2中的river改写为关系代词which,
然后把介系词片语in which移动到句首扮演连接词角色，成为关系子句 in which the deadly piranha roam,
再将关系子句置于1的先行词River 之后。
The Amazon is a pristine river in which the deadly piranha roam.
(a pristine river 先行词， 介系词in which是地方副词做补语)
将动词roam提前到主词前面，结构类似于there is / are，可以进行倒装。
倒装句：
The Amazon is a pristine river in which roam the deadly piranha.
关系子句句型不符合there is / are的不可采用倒装
The Amazon is a pristine river. 亚马逊是条原始河流。
Environmentalists love the river. 环保人士喜爱那条河。
改成关系子句
The Amazon is a pristine river which environmentalists love.
（a pristine river 先行词 which 做宾语） 此句中which做love的宾语而不是地方副词，所以不符合there is /are的句型，不可倒装。
形容词补语倒装
原句：
Prime Minister Mikhail Kasyanov, who held the keys to Russia's budget, was chief among them.
倒装句：
Chief among them was Prime Minister Mikhail Kasyanov, who held the keys to Russia's budget.
其中最重要的就是总理米哈伊尔·卡西亚诺夫，此人手中掌握了俄罗斯的预算。
原句：The legitimate fear black people have for their lives is more important.
倒装句：
More important is the legitimate fear black people have for their lives.
更重要的是，黑人有十足的理由担心自己生命的安全。
助动词或be前移，句中无助动词或be不可倒装
省略连接词的倒装
仅适用于有助动词或be动词的假设法语气的副词子句 ，可以把助动词或be 倒装到主词前面，取代连接词if.
原句：
If I had been there, I could have prevented the accident.
如果当时有我在，我或许可以防止意外发生。
从属连接词if引导的副词子句，动词的语气是表示[过去时间非事实]的假设语气。
动词片语had been 包括文法助动词had, 可以选择把had倒装到句首，从而省略掉连接词if
倒装句：
Had I been here, I could have prevented the accident.
原句：If I were a millionaire, I would first buy a big house.
如果我是百万富翁，我会先买个大房子。
从属连接词if引导的副词子句的动词采用[现在时间非事实]的假设语气，
有be动词（were）.可以将be动词提前到句首，省略if
倒装句：
Were I a millionaire, I would first buy a big house.
原句：Though it may be ever so humble, there is no place like home.
不论多么寒微，也没有其他像家这么好的地方
连接词though 引导让步状语副词子句，
有 be，可以将be动词提前到句首，省略though
倒装句：
Be ever so humble , there is no place like home.
假设语气的副词子句如果是普通动词（没有助动词或be）,不可倒装
原句：
If I knew how, I would gladly do it. 很可惜我不会，不然我很乐意做这件事。
从属连接词if 引导的条件副词子句，属于[现在时间非事实]的假设语气。
但句子中只有普通动词knew，缺乏助动词或Be动词等可以移动的东西，所以无法倒装，if不能省略。
助动词或be前移、普通动词加do
否定副词的倒装
修饰动词、具有否定功能的副词如 seldom, only, never, hardly 之类， 如果倒装到句首来加强语气，动词也要跟着倒装（注意：单独的not不能倒装）
句中有助动词或be，前移助动词或be
原句：
I will never trouble you again. 以后我再也不敢麻烦你了。
片语动词will trouble中间有表示否定的频率副词never( = not ever)，配合will构成否定句。 如果把表示否定的副词移到句首来加强语气，那么助动词will就会跟着它倒装到前面以维持否定句（will not）的构造。
倒装句:
Never will I trouble you again.
The train is seldom delayed. 火车很少误点。频率副词seldom[很少]，具有否定的功能。 如果把seldom移到句首来加强语气，be动词必须跟着它倒装到前面以维持否定。
倒装句:
Seldom is the train late.
句中无助动词或be ,必须加上 文法助动词do
The man hardly ever leaves home after 9 p.m. 这名男子晚上九点之后几乎从来不出门。
频率副词 hardly ever具有否定功能，表示[几乎从不]。 若移到句首加强语气，后面的普通动词leaves就必须加上文法助动词does来维持否定句，并把does倒装到主词前面。
倒装句:
Hardly ever doesthe man leave home after 9 p.m.
The doctor did not leave the patient until he was sure everything was all right.到有把握一切都没问题了，医生才离开这位病人身旁。
主要子句是否定句。 如果把副词not和副词子句 until he was sure everything was all right移到句首加强语气(不能只倒装not一个字)，普通动词leave仍然需要一个文法助动词did来维持否定句的结构，并且也要倒装到主词前面。
倒装句:
Not until he was sure everything was all right didthe doctor leave the patient.
only
强调范围的副词，具有[排除其他]的否定功能
句中有助动词或be，前移助动词或be,句中无助动词或be,必须加上文法助动词do
需要倒装
The Johnsons went abroad only last week. Johnson一家上个礼拜才出国。
时间副词last week修饰动词went的时间。 强调范围的副词only，用来强调[不是很久以前]，因此具有否定以为。 如果选择将only last week移到句首来加强语气，需要采用倒装，因为句中只有普通动词went,所以需要加上文法助动词did来维持否定句。
倒装句：
Only last week didthe Johnsons go abroad.
无需倒装
Only Mr. Johnson went abroad last week. 上个礼拜只有Johnson先生一个人出国。
强调范围的副词only修饰的对象是主词Mr. Johnson，整个句子没有任何位置移动，不需要倒装。
助动词或be前移、普通动词加do，省略述部
So 与neither的倒装
类似于省略句或简单句，搭配so 与 neither进行倒装，把助动词或be移到主词前面，如果普通动词则在前面加助动词do, 其余一概省略以避免重复。
He likes basketball. 他爱篮球。
So do I. （= I like basketball.） 我也是
两个句子只是主词不同，整个述部（like basketball）是相同的。 可先用一个副词so表示[同样]，再把它移到句首，目的是让它和它所代表的like basketball 接近，比较较清楚。
副词移到句首，动词就得跟着移动到主词 I 前面成为倒装句。
为了避免重复，动词like 应采用助动词 do取代，成为So do I.
He can speak Spanish. 他会说西语。 So can I. 我也会。He is a teacher. 他是老师。 So am I. 我也是
He won't give up. 他不肯放弃。 Neither will I. (= I won't give up.) 我也不肯。两个句子主词不同（一个he 一个I），述部相同won't give up [will not give up]. neither表示[也不],表否定含义，对应won't中的否定副词not 。
副词移到句首，动词will跟着移动到主词 I前面，成为倒装句。
比较级 的倒装
比较级的句子（从属子句）多半可以选择倒装。
原句：
His house is bigger than mine is. 它的房子比我的大
倒装句: His house is bigger than is mine.
减化句： His house is bigger than mine.
than 引导的从属子句本来应该是than mine is big，补语big因为是比较点，与主要子句重复，已经被省略了，所以从属子句等于是和主要子句共用一个补语。这种情况下，若选择倒装，动词is会放在主词mine与前面的补语bigger之间。is和主要子句的动词也重复，所以也可以把is省略掉。[简化规则看简化子句章节]
My uncle loves his cat very much. 我叔叔很爱他那只猫。
His wife, who keeps a singing canary and two talking parrots, doesn't love the cat so much. 他太太养了一只会唱歌的金丝雀，两只会讲话的鹦鹉，就不那么爱猫了。
使用more...than连接起来制造一个比较句，比较点是very much: 两个人来比谁爱猫比较多
不做省略A:
My uncle loves his cat more [ than his wife, who keeps a singing canary and two talking parrots, loves the cat. ]
省略A:
My uncle loves his cat more than his wife, who keeps a singing canary and two talking parrots.(不佳)
从属连接词than 引导的副词子句[中括号内的部分]修饰比较级的副词more。副词子句中，动词loves与受词the cat都和主要子句重复，省略掉这些重复部分后句子是省略A 句，意思并不明确。
意思不明确原因是：可以有以下两种解释
- his wife 和主词my uncle比较，意思是 [我叔叔爱猫超过他太太爱猫]，不做省略A句 省略后的结果。
2.his wife 和受词his cat比较，意思是[我叔叔爱猫超过他爱老婆] My uncle loves his cat more [than he loves his wife, who keeps a singing canary and two talking parrots.] 该句省略后的结果。 一句话有两种解释，所以句子表达不清楚。
省略B:
My uncle loves his cat more [ than his wife, who keeps a singing canary and two talking parrots, does. ]
句不做省略A句 不能省略为 My uncle loves his cat more than his wife，而必须采用助动词does取代述部 loves the cat
倒装C:
My uncle loves his cat more [ than does his wife, who keeps a singing canary and two talking parrots. ]
副词子句中的主词his wife与助动词does的距离太远了，助动词does和它代表的对象loves his cat之间距离也太远，需要采用倒装：把does倒装到主词his wife前面。
as与though子句的倒装
用连接词 as 或 though 引导，表示让步的副词子句，可以选择倒装。
倒装句：
Try as/though you may, you will never persuade him. 要试你尽管试，你是说服不了他的。
前半句可还原为表示让步的副词子句 though you may try, 倒装方式是将原形动词倒装到句首来加强语气，其他内容不动
Be that as it may, I'm not going to change my plans.事情尽管是这样，我还是不会更改我的计划。
前半句可还原为让步的副词子句 as/though it may be that, 把be that 倒装到句首来加强语气，其他不变。
Short as / though he is, he play good basketball. 矮归矮， 他篮球打得非常好。前半句可还原为让步副词子句 though he is short, 只把形容词补语short 倒装到句首以加强语气，其他部分不变。
Fool as I was, I did exactly what the conman told me to.当时我那么傻， 那个骗子叫我做什么我就做什么
前半句可还原为表示让步的副词子句 as I was a fool。 不过，倒装句中fool要采用零冠词，因为fool在这里的用法更接近与形容词foolish,已经不是普通名词的用法了。
副词子句
特点：可有可无，整个删掉也不影响主要子句句型的正确性。
副词类，在主要子句中来修饰动词，形容词，副词等。
与名词子句的比较
来自直述句
改为名词子句时，要外加无意义的从属连接词that,表示[那句话，那件事]。
改为副词子句，不加that，而要加because, although , if , as, when , where等[有意义]的连接词，来表达[原因，让步，条件， 状态，时间地方]等逻辑关系。
名词子句：
I believe [that ghosts are real]. 我相信鬼魂确有其事。
副词子句：
I believe that , [because I have seen one with mu own eyes]. 我相信，因为我亲眼见过。
也可以外加so...that, such ...that, in that, in order that之类含有that 在内的连接词，表示[目的，结果，限制]等
名词子句：
He said sincerely [that he was sorry].
副词子句：
He said it so sincerely [that his wife forgave him right away].
他说的非常诚恳，结果他老婆当场就原谅他了。
information question
有疑问词引导的疑问句改造为名词子句，只需要拿掉问号，还原成非疑问句的动词顺序即可，疑问词本身就可以充当连接词来引导名词子句。
Where the criminal is hiding\] is anybody's guess. 犯人现在藏匿在何处，这个问题没有人知道。 疑问句： Where is the criminal hiding?
有疑问词引导的疑问句改造为副词子句：
1.拿掉问号，还原成份额诶疑问句的动词顺序
2.在疑问词前面加上no matter(表示[不论])， 或在疑问词后面加上-ever的字尾(同样表示[不论])
No matter where the criminal is hiding\] , the police is going to get him. 不论犯人现在藏匿在何处，警方都会将他逮捕。 \[Wherever the criminal is hiding\], the police is going to get him.
Yes/No question
没有疑问词引导的疑问句，改造成名词子句时 要拿到问号，同时外加从属连接词whether（表示[是否]，来自either... or）
Whether he's still alive (or not) is difficult to say.
他是否还活着这个问题很难说。
疑问句：
Is he still alive?
没有疑问词引导的疑问句，改造成副词子句：拿掉问号，同时外加从属连接词whether(表示[不论])或不加whether 改成加no matter也可以
Whether he's still alive (or not), I'm not going to marry anyone else.
不论他是否还活着，我都不会嫁给别人。
No matter he's still alive (or not), I'm not going to marry anyone else.
常用副词子句连接词
After ...之后，时间副词子句
After the graduated , the young man found himself unemployed.
毕业之后，这位年轻人发觉自己失业了。
Although / though 虽然，让步副词子句
My sister doesn't have a boyfriend now , although (though) she is very pretty.
我妹妹现在没有男朋友，虽然她长得很漂亮。
As 正如，如同
Haste makes waste, as the saving goes. 俗话说，欲速则不达。
As 当...时
Tears ran down the woman's cheeks as the train pulled away.
火车离开时，泪水留下这个女人的脸颊。
As 因为，原因副词子句
As there is little time left, we'd better hurry. 因为时间所剩无多，我们最好赶快。
As... as 比较副词子句， 修饰限定词many
You can stay on for as many days as you like. 你爱停留几天就可以停留几天。
As far as 程度副词
As far as I know, your friend had no part in the scandal.
就我所知，你的朋友并未涉入这桩丑闻。
As if 好像
The student raised a hand , as if he was going to ask a question.
这学生举手，好像要问问题。
As long as 只要，条件副词子句
As long as there is ammunition left, we will fight on.
只要还有弹药剩下，我们就会奋战下去。
Because 因为， 原因副词子句
I can't go out with you tonight because I have a previous engagement.
我今晚不能跟你出去，因为先跟别人约好了。
Before ...之前，时间副词子句
Read the contract carefully before you sign it. 签约之前要仔细阅读合约内容。
For 因为，原因副词子句
You needn't fear my brother, for he's a good man. 你不必怕我哥哥，因为他是个好人。
For fear that 唯恐
The camper put water on the ashes for fear that he might start a forest fire.
露营的人在灰烬上浇水，唯恐会酿成森林火灾。
If 如果，条件副词子句
I you prefer, we can settle our differences in court.
如果你这样选择，我们也可以上法院解决我们的歧见。
In case 万一，目的副词子句
In case you haven't heard, SARS has broken out again. 万一你还没听说：SARS又爆发了。
In order that 目的是，目的副词子句
The speaker raised his voice in order that everyone might hear him.
演讲人放大了音量，目的是让每一个人都听得到。
In that 意思是说，用做解说的副词子句
The experiment is a success in that it has proved the theory wrong.
实验成功了，意思是说它证明了这项理论有误。
文中实验[成功]，但[成功]用在这里的解释和一般不同，因此需要解说：所谓成功，并不是获得了预期的效果，而是因为没有获得预期的效果而证明理论有误。 对success 要做出特别的解释，所以后面加上in the sense that...，省略为in that,构成用作解说只用的副词子句，修饰is
In that 是 in the sense that的省略
No matter 不论，条件副词子句
No matter (or whether) my father agrees or not, I'm going to be a singer.
不论我父亲同不同意，我都要去当歌星。
No sooner... than 刚一... 就...，比较级连接词，时间副词子句
No sooner had the bell rung that the students jumped up to leave.
刚一敲钟，学生就跳起来走人了。
Now that 既然，原因副词子句
Now that you're graduated, you should start working to support yourself.
既然你毕业了，应该开始工作自力更生了。
修饰动词should start的原因。
On condition that 条件是
The man spoke to the press on condition that he remain anonymous.
这位男子向媒体发言，条件是他要保持匿名。
此处是[间接命令句]语气，所以remain采用原形动词
Only that 只不过，让步副词子句
I really like to go to the party, only that I have to study for an exam.
我真的很想去参加宴会，只不过我必须准备考试
Lest 以免
Let me explain myself more clearly , lest there should be any misunderstanding.
请容我说明清楚，以免有误解。
Since 自从
It has been three years since I last visited the small town.
我上回造访这个小镇，至今已经三年了。
Since 既然
Since there's nothing more to do here, we might as well go home.
既然再次已经没事可做了，我们不妨都回家吧。
So that 结果
There were three examiners in the small room, so that no student dared to cheat.
小房间里有三命监考官，结果学生都不敢作弊。
So that 目的是
The school decided to send more examiners so that the students wouldn't cheat.
校方决定加派监考官，目的是让学生不作弊。
So... that 引导的副词子句修饰形容词或副词
Is was so cold that the lake was frozen through. 天气冷到整座湖接了冰到底。
Such... that 引导的副词子句修饰名词
It was such a cold day that few ventured outdoors. 天气很冷，结果没什么人敢出门。
Suppose 条件副词子句，假设
Supposed you needed advice on your marriage, where would you go?
假设你的婚姻需要请教别人的意见，你会到什么地方去？
Than 比较级连接词，引导的副词子句修饰限定词more来做比较
That man has more money than he can ever spend. 那个人的钱一辈子都花不完。
Thereby 因此，结果副词子句
With age, the mineral content of human bones decreases , thereby making them more fragile. 人体骨干的矿物质含量会随着年龄降低，因此造成谷歌越来越脆弱。
还原：
With age, the mineral content of human bones decreases, so that this makes them more fragile.
so that\] 表结果的副词子句，主词this指的是前面这个句子，简化时可以省略，普通动词一律加ing做词类变化，成为表结果的现在分词构句making them more fragile。 表因果关系的连接词so that 一般不保留，但可以用连接副词thereby（因此）取代。
Until 时间副词子句
Wait here until you are called for. 在这等，知道有人叫你的名字。
祈使句+省略句， Wait here [until you are called for you].副词子句中宾语you和主语一样所以可以省略。
When 时间副词子句
I was in the bath when the doorbell rang. 门铃想起来的时候我在泡澡。
Where 地方副词子句
The virus thrives where people live in close proximity to one another.
这种病毒滋生在人口密度高的地方。
While 时间副词子句：当...时
The woman made breakfast while her husband was still sleeping.
在她丈夫还在睡觉的时候，这个女人做好了早餐。
While 条件副词子句：虽然
While there is no hurry , I would prefer to get the job done sooner than later.
虽然不急，最好还是把工作赶快做完。
Whether 与 Wh-ever
外加whether如果解释为[不论]，构成的是表示让步的副词子句。
wh-ever拼法的字如果解释为wh-外加no matter，意思也是[不论]，也表示让步副词子句，修饰主要子句的动词。
Whether (or no matter) I do well or badly at the exam, I'm going out tonight to celebrate the end of the semester. 不论我考试考得好不好，今晚我都要出去庆祝学期结束。
Whoever (or no matter who) told you the story , it can't be true.不论是谁告诉你的，这个故事都不可能是真的。
Whatever (or no matter what) is troubling you ,tell me about it.不论你有什么困扰，都请你告诉我。
Whenever (or no matter when) the man hears the song, he thinks of his first love.不论什么时候这名男子听到这首歌，都会想起他的初恋情人。
Wherever (or no matter where) there is sunshine and water, there is life.只要有阳光和水的地方都有生命。
However (or no matter how) you look at the matter , it isn't fair.这件事情不论你怎么看，都不公平。
Whichever (or no matter which) university you choose, you will be admitted.不论你挑哪所大学，都可以拿到入学许可。
表示时间与表示条件的副词子句，以现在式代替未来式
表示时间的副词子句
区分名词子句和副词子句：
He didn't tell me [when he bought the house].（名词子句） 他没有告诉我他是什么时候买了这栋房子。
He didn't tell me the price [when he bought the house].（副词子句） 他买这栋房子的时候并没有告诉我价钱。
Do you know [when he will return]? 你知道他什么时候回来吗？He will call you [when he returns]. 到他回来的时候会打电话给你的。
第一句中[名词子句]中的疑问词when表示[什么时候]，与未来式[将会]并无冲突。做动词know的受词。所以文法[表示时间的副词子句用现在式代替未来式]并不适用于名词子句，所以用will return
第二句中[副词子句]中的连接词When表示[当... 时]，[副词子句]放在主要子句中修饰will call的时间。[当...时]这种解释与未来式有冲突，因为[当他回来时]的意思是[当做现在已经到了那个时候]，所以把[回来]的时间设定为就是现在，因此必须用现在是returns. 即[表示时间的副词子句用现在式代替未来式]
as soon as , before , after等都可以使用，也可以制造出时间副词子句，里面都不适合用未来式，要改为现在式
You can have this computer [when I have finished] - in about half an hour.
等我用完了这台电脑就给你 - 再过半个小时吧。
副词子句\]修饰can have的时间，如果是未来时间，必须\[当做到了那个时候\]，将未来式当做现在，所以动词的完成式只能采用现在完成式的形式（have ven） 名词子句： I'll let you know \[when he will return\]. 我会让你知道他什么时候会回来。 副词子句： I'll let you know \[when he returns\]. 到他回来的时候我就会让你知道。 利用时态与语气可以判断从句是名词子句还是副词子句。 副词子句的未来式使用现在式returns 名词子句的未来式使用未来式will return
表示条件的副词子句
名词子句：
I can't remember [if I returned off the gas or not]. 我想不起来到底有没有把瓦斯关掉
副词子句：
I have to go back [if I didn't turn off the gas]. 如果没有关瓦斯，我就得回去一趟。
动词 can't remember 是及物动词，后面应该有受词，所以[if I return off the gas or not]应该是名词子句，做动词的受词。if相当于wether,解释为[是否] 动词have to go 是不及物动词，后面没有放名词子句的位置，所以[if I didn't turn off the gas]是副词子句，此时if解释为[如果]，修饰动词have to go back的条件。
名词子句：
I have no idea [if this plan will work or not]. 我根本不了解这个计划到底会不会奏效
副词子句： I have a large reward for you [if this play works].
如果这个计划奏效了，我有个大奖要送给你。
第一句可拆为： I have no idea about the question. Will this plan work? 加上表示[是否]的连接词whether可改为名词 whether this plan will work (or not)，放在主要子句后面，当the question 的同位格。然后将介系词片语about the question省略掉，再将whether换为if. 连接词if 解释为[是否]时，和未来式[将会]的解释并无冲突，所以句子可以采用未来的动词Will work.
第二句从属子句 if this plan works是加上解释为[如果]的连接词构成的，放在主要子句中修饰动词hava的条件，是副词子句。 连接词if解释为[如果]时，语气要设定在[假如真]，也就是把一件尚未发生的事先当做真的来讲，因此要采用叙述事实的[直述语气]，不能再使用不确定的will,所以是works
后续再补充吧。。。