中考英语复习重点:2017中考英语复习：介词的省略

1. 在一些结构中，动名词前面的介词 in 常常可以省略;在另一些结构中，介词 from 常常可以省略。中学生常见的这类结构有：
　　be busy (in) doing sth
　　be kept busy (in) doing sth
　　be engaged (in) doing sth
　　have trouble / difficulty (in) doing sth
　　spend time (in) doing sth
　　prevent sb (from) doing sth
　　stop sb (from) doing sth
　　It is no use (in) doing something
　　There is no use/ good (in) doing sth
　　但是，当 spend time in doing sth， prevent/ stop somebody from doing sth 中的 spend， prevent 和 stop 为被动语态时，介词 in 和 from 一般不可省略。例如：
　　They spent a large sum of money (in) building the tower. →
　　A large sum of money was spent in building the tower.
　　The heavy rain prevented us (from) attending the lecture. →
　　We were prevented from attending the lecture by the heavy rain.
　　2. 由 what， whose， how， when， whether 等引导的名词性从句或不定式短语作介词宾语时，其前的 of， about 通常可以省略。例如：
　　She has no idea (of) what to do.
　　I'm not aware (of) how he got it.
　　He hesitated (about) what to do next.
　　I'm too old to care (about) what I look like.
　　3. 引导时间段的介词 for 和表示行为方式的 way 前面的介词 in 常可省略。例如：
　　The snowy weather lasted (for) two weeks.
　　He lived alone (for) ten years.
　　Don't treat her (in) that way.
　　表示时间段的 for 短语出现在句首或否定句中时， for 一般不能省略。例如：
　　We haven't seen each other for two years.
　　For many years， he lived in the shed alone.
　　4. age， color， weight， length， width， height， design， shape， size 等名词作介词 of 的宾语，而且 of 短语在句中作表语时， of 可以省略。例如：
　　The two machines are (of) the same design.
　　The boys are (of) the same height .
　　It is (of) no use to me.

本文来源：https://www.wddqw.com/SpTn.html