介宾短语可以做表语:
I am in the classroom.
He is in love.
The athletes are past their prime at 25.
These mobile phones are ;in great demand.这种手机需要量很大。
when=表示时间的介词(如:in, at, on, during等)+which
例句:This is the bed where I once slept.=This is the bed in which I once slept.这是我曾经睡过的床。
why=表示原因的介词(如:for等)+which
例句:I cannot find the reason why you refuse my love.=I cannot find the reason for which you refuse my love.我找不到你拒绝我的爱的理由。
介宾短语还可充当:表语、定语和补语
(1)介宾短语充当表语:I am at home.
(2)介宾短语充当定语:The book on the desk
(3)介宾短语充当补语:I went school from home.
介宾短语可以做表语吗
介宾短语可以做表语。表语用于";主一系一表”的句型中,句子中没有行为动词就要用这个句型。一般情况下,可用作表语的词有名词、形容词和介词短语。例如:
1、 She is a beautiful girl. ; girl是名词做表语。
2、 English is very important. ; important是形容词做表语。
3、 English is of importance. ; 介词短语of importance做表语。
4、 The book is on the desk. 介词短语on the desk做表语。