高三英语第一轮复习主要进行的是单词的积累和语法的全面掌握，在上课课文学习和课后阅读练习中不断巩固抓牢，为后面的做题演练大幅度提分打基础。威廉希尔app 高考频道整理高考英语常考词汇用法及高考英语语法，帮助大家分小节记忆。

疑问词 +不定式

what ,how, when,where,whether,which等疑问词 + 不定式构成的短语相当于名词从句，多用在ask,decide,know, tell, explain, find out, consider, wonder后作宾语，可以改换成相应意义的宾语从句对比:

①Please show us how to use it./Please show us how we will use it.

请为我们示范一下如何使用。

②We don’t know whether to accept his invitation./We don’t

know whether we should accept his invitation.

我们不知道是否应该接受他的邀请。

[应用]填空

①There’re so many kinds of tape-recorders on sale that I can’t make up my mind______ to buy.(MET’92)

A what B.which C.how D.where

②Last summer I took a course on _______.(MET’90)

A.how to make dresses

B.how dresses be made

C.how to be made dresses

D.how dresses to be made

Key:①B ②A