英文四大句型
一．S+V+O
S-----主语从句，what/whether/how
不定式（逻辑主语）
动名词（逻辑主语）
名词+定语从句/介宾短语
V------几个谓语动词平行
O-----how/what宾语从句
倒装加大难度
Among top students are you
Among the top students, you are the best
主谓宾从句也可倒装-----宾语从句可倒装在前面
如果怎么也读不懂，有可能主谓宾有倒装了
宾语后置------set something in motion
二．---------------，S+V+O
作状语4种形式
1． When, since, because, if, though, before引导状语从句
Though (you are ) young, you can understand it.
没有主句就没有从句的生命力
状语从句的省略原则：状语从句与主句主语是一致的，并且状语从句包括谓语动词be(am, is, are或其他时态形式)
We, because we are late, are punished.
2. To do 不定式放在句首
For me to learn English well, my mother went to the lecture. ----加for sb.逻辑主语构成复合结构
3．Doing/done, S+V+O doing---主语发出动作；done----主语承受动作
Singing and dancing, the children went back home
Judged guilty, Tyson was sentenced to prison several years ago.
Doing/done同主句的谓语动作发生动作如果有一段距离，用Having done/Having been done
Having done = doing的完成形式
Having been done = done的完成形式
4. 介宾短语-----有时移到主谓之间
In Wuhan, we met with each other.
三．S，---------------，+V+O
空格处5种形式, 后四种是第一种的省略形式
1、Whose, who, when, which, in which引导的定语从句----没有that引导从句
Tom, (who is) my neighbor
2、冠词/形容词性物主代词+名词构成同位语
Dalian, (which is) my hometown, is very beautiful.
3、Done/doing
4.、形容词
Panda, (which is) native to China
5、the first+名词+to do
Panduo, (who is )the first lady to get to the top of Himalaya, is a Tibetan.
其中2.3.4种经常提到句子前面，不加逗号
四． S+V+O，---------------------
空格处有三种形式
1、When, if, since, though, which, who, whose, where, in which等引导的状语从句或定语从句
2、冠词/形容词性物主代词+名词
We live in Dalian, a beautiful city.
3、doing/done 作状语
当把四个句型拼合起来后，你一个句子就是一段。