学习必备
欢迎下载
高考英语语法专项复习学?/p>
2011-4-30
助动词与情态动?/p>
(一?/p>
助动词有
be, have, do, will, shall
?/p>
它们本身没有词义?/p>
只和实义动词的一定形
式构成复合谓语,用来表示时态和语态,?/p>
成否定、疑问及加强语气等?/p>
/
1
?/p>
be (am, is, are, were, been)
(l)
?/p>
be + -ing
”构成进行时态;
?/p>
2
?/p>
?/p>
be +
过去分词?/p>
构成被动语态;
?/p>
3
?/p>
?/p>
be +
动词不定式”构成复合谓语:①表示按计划
安排要发生的事?/p>
The
prime
minister
is
to
visit Japan next year.
总理将于明年访问?/p>
?/p>
?/p>
?/p>
?/p>
?/p>
?/p>
?/p>
?/p>
You're
to
do
your
homework before you watch TV
.
你得做完?/p>
作业才能看电视?/p>
2
?/p>
have (has, had)
(1)
?/p>
have+
过去分词”构成完成时
态。如?/p>
Have you seen the film ? (2)
?/p>
have
been + -ing
”构成完成进行时态。如?/p>
What
have you been doing these days?
这些日子
你一直在干什?/p>
?
3
?/p>
do (does, did)