新概念英语语法全攻略 新概念英语第三册语法总结：代替与省略

新概念英语第三册语法总结：代替与省略  

英语中，为了避免不必要的重复，经常用so
not
to
do
does 代替前面出现的动词或相关内容。

(1) 从上两例中看出，do / does / did 代替动词。
He translated the article better than I did.   （did代替wrote it）
— Do you think she is clever?
— I think so.   （so代替 she is clever）
(2) "so 与 not" 代替某个词、短语、句子等，通常用于hope
think
believe
expect
suppose
be afraid
fear
imagine
etc后作宾语。
— Is it correct?
— I'm afraid not.  (not correct)
(3) "to" 用作不定式，常跟随下列动词：want
mean
hope
expect
refuse
seem
intend
be
afraid
etc.
 I asked him to go to the party
but he refused to. (go to the party)
(4) "do so
do that
do it" 用来代替动态动词，而不能代静态动词。
— He gave up studying English.
— Why did he do so?   (= give up studying English)
— The dish tastes nice.
— Yes
so it does.  (tastes nice)
（此句不能用it does it 或 it does so
因taste属静态动词。）
(5) 为使语言精炼，避免不必要的重复，对话中常用省略形式。
— He is thinking of buying a car?
— Is he? （这里，“thinking of buying a car”被省略了。）
— Will he e back in time?
— Perhaps. （省略了he will e back in time.）