定语从句和名词性从句中的省略

⒈ 在限定性定语从句中，作宾语用的关系代词whom, which, that可省略；在以the same...as和such as引出的某些定语从句中，也可省略与主句相同部分。

如：The girl (who\whom\that) the teacher spoke to is Liu Ying.

I don't like such books as this (is).

⒉ 定语从句中的"主语+系动词be"可以省略。

如：The goods (which were) ordered last month haven't arrived yet.

⒊ 在know, think, consider, suppose, find, believe, say, decide等动词后面所接的宾语从句中，连词that可以省略；若带有多个宾语从句，只有第一个that可省略，其余的则不能。

如：I think (that) it will clear up(转晴)this afternoon.

He said(that) the text was very important and that we should learn it by heart.

⒋ 由which, when, where, how和why引导的宾语从句，可全部或部分省略。

如：He will come back, but he doesn't know when ( he will come back).

⒌ 在与suggest, request, order, advise等词相关的名词性从句中，须用虚拟语气形式'should+动词原形，should可省略。

如：The officer ordered that his men (should) fire.

It is suggested that we (should) go to see the flim.

复合句中特殊的省略现象

⒈ 主句省略多用于句首，在答句中，主句或者一些成分可全部省略。

如：(It is a) Pity that I didn't go to mary's birthday party yesterday.

⒉ 省略一个从句或从句的一部分，可用so或not代替。

如：-She may not be free today.

-If so (so=she is not free today), we will have to report the manager.

-Is he feeling better today?

-I'm afraid not(not=he isn't feeling better today).

动词不定式省略，只保留to的场合

⒈ 不定式作某些动词的宾语时，常见动词如like, love, care, hope, wish, expect, afford, forget, prefer, refuse, mean, try, oblige（强迫）,advice, persuade, agree, want, remember, manage等。

如：You can do it this way if you care to.

-You should have thanked her before you left.

-I mean to , but when I was leaving I could't find her anywhere.