6. 連接代詞和副詞前介詞的省略
在tell, ask, depend, look, certain, clear, sure, idea, decide 等常用詞后面，who, which, what, where, whether, how 等引導(dǎo)的從句前面的介詞通?？梢允÷裕?BR> Have you any idea (of) when he will come? 你知道他什么時候來嗎?
I’m not certain (of) what I’m supposed to do. 我不肯定我應(yīng)該做什么。
It depends (on) whether you can afford it. 這要看你是否買得起。
Tell me (about) what he said to you. 告訴我他給你講了些什么。
若以上從句被簡化為“疑問詞+不定式”，其前的介詞也可省略：
I’m not quite clear (about) what to do. 我不很確定要做什么。
【注】除以上提到的少數(shù)情形外，在其他情況下則通常不宜隨便省略：
We’re worried about where he is. 我們擔(dān)心他上什么地方去了。(about不能省)
7. 介詞in的省略
(1) 在 in this way, in that way, in the same way, in another way 等表達中的介詞in 通?？梢允÷裕?BR> Do it (in) this way. 這樣做。
Let me put it (in) another way. 讓我用另一種方式解釋。
(2) 許多動名詞前的介詞in可以省略：
Be careful (in) crossing the street. 過街道要小心。
He lost no time (in) answering the question. 他馬上就回答了那個問題。
但若介詞 in 出現(xiàn)在句首，則通常不宜省略：
In crossing the street he was run over. 他在穿過馬路時被汽車撞倒。
在這類用法中要特別注意一些常用句型：
be busy (in) doing sth 忙于做某事
be late (in) doing sth 做某事做晚了或做遲了
spend money [time] (in) doing sth 花錢(時間)做某事
waste money [time] (in) doing sth 浪費錢(時間)做某事
have luck (in) doing sth 做某事時有運氣(走運)
have difficulty (in) doing sth 做某事有困難
have trouble (in) doing sth做某事有困難
have bother (in) doing sth 做某事費勁
have a problem (in) doing sth做某事有困難
have a good time (in) doing sth 做某事很開心
have a hard time (in) doing sth 做某事很辛苦
find difficulty (in) doing sth 做某事發(fā)現(xiàn)有困難
There is no difficulty (in) doing sth 做某事沒有困難
There is no use (in) doing sth 做某事沒有用
There is no point (in) doing sth 做某事沒有意義
在tell, ask, depend, look, certain, clear, sure, idea, decide 等常用詞后面，who, which, what, where, whether, how 等引導(dǎo)的從句前面的介詞通?？梢允÷裕?BR> Have you any idea (of) when he will come? 你知道他什么時候來嗎?
I’m not certain (of) what I’m supposed to do. 我不肯定我應(yīng)該做什么。
It depends (on) whether you can afford it. 這要看你是否買得起。
Tell me (about) what he said to you. 告訴我他給你講了些什么。
若以上從句被簡化為“疑問詞+不定式”，其前的介詞也可省略：
I’m not quite clear (about) what to do. 我不很確定要做什么。
【注】除以上提到的少數(shù)情形外，在其他情況下則通常不宜隨便省略：
We’re worried about where he is. 我們擔(dān)心他上什么地方去了。(about不能省)
7. 介詞in的省略
(1) 在 in this way, in that way, in the same way, in another way 等表達中的介詞in 通?？梢允÷裕?BR> Do it (in) this way. 這樣做。
Let me put it (in) another way. 讓我用另一種方式解釋。
(2) 許多動名詞前的介詞in可以省略：
Be careful (in) crossing the street. 過街道要小心。
He lost no time (in) answering the question. 他馬上就回答了那個問題。
但若介詞 in 出現(xiàn)在句首，則通常不宜省略：
In crossing the street he was run over. 他在穿過馬路時被汽車撞倒。
在這類用法中要特別注意一些常用句型：
be busy (in) doing sth 忙于做某事
be late (in) doing sth 做某事做晚了或做遲了
spend money [time] (in) doing sth 花錢(時間)做某事
waste money [time] (in) doing sth 浪費錢(時間)做某事
have luck (in) doing sth 做某事時有運氣(走運)
have difficulty (in) doing sth 做某事有困難
have trouble (in) doing sth做某事有困難
have bother (in) doing sth 做某事費勁
have a problem (in) doing sth做某事有困難
have a good time (in) doing sth 做某事很開心
have a hard time (in) doing sth 做某事很辛苦
find difficulty (in) doing sth 做某事發(fā)現(xiàn)有困難
There is no difficulty (in) doing sth 做某事沒有困難
There is no use (in) doing sth 做某事沒有用
There is no point (in) doing sth 做某事沒有意義