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英语非谓语动词的用法看这两个句子为什么一个but后接动词原形,一个接to do?The departure time o

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英语非谓语动词的用法
看这两个句子为什么一个but后接动词原形,一个接to do?
The departure time of the plane has been postpond.so we have mothing to do now but wait
that was so serious a matter that i had no chioce but to call in the police
英语非谓语动词的用法看这两个句子为什么一个but后接动词原形,一个接to do?The departure time o
介词后面必须带动词的动名词形式,这一规则的唯一例外是except和but(介词).在它们后面带动词原形:
I could do nothing except agree.我除了同意,没有别的办法.
He did nothing but complain.他只是抱怨,什么也不做.
但是如果but用做连词,即如果它引导从句,它的后面就可直接跟完整的不定式或动名词:
Being idle sometimes is agreeable,but being idle all the time might become monotonous.有时清闲无事是令人惬意的,但总是闲呆着就可能变得单调乏味了.
To be idle sometimes is agreeable,but to be idle all the time might become monotonous.有时清闲无事是令人惬意的,但总是闲呆着就可能变得单调乏味了.
lz给的句子里,第一个but后面接的动词,but做介词
后一个but做连词,接的短句