are going to have the service man - an eletric fan

问题描述:

are going to have the service man _ an eletric fan
They are going to have the service man _ an eletric fan in the office tomorrow.
A.install
B.to install
C.to be installed
D.installed
想问问这题答案为什么是A,我根据have sb done选了D
1个回答 分类:英语 2014-11-17

问题解答:

我来补答
记住这个句型 have sb DO sth 是让某人做某事,因为DO 部分要用动词原型,而不是不定式所以不能选B .如果DO 部分用过去分词,表示让某事被做.如:have an electric fan installed.这就是have sth DONE 句型.所以不能选D.
have sb DO sth 是让某人做某事
have sth DONE 让某事被做
have to do sth 表示必须做某事
have done sth 是现在完成时的基本结构.
 
 
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