介宾结构中,只要明白介词短语的成分就OK了.
介词短语在句子中可作后置定语、表语、补足语、状语和主语.
1、后置定语：The man in black is Mr.Zhang.穿黑衣服的人是张先生.
2、表语：He was already in his fifties.他已经五十几岁了.
3、补足语：I found everything in good condition.我发现一切状况良好.
4、状语：We went there by bike.（方式状语）我们骑自行车去的.
5、主语：From Shenyang to Dalian is four hours' drive.从沈阳到大连开车要四个小时.