一些情态动词的常用的意义往往为高考考查的焦点,考生须准确理解其含义并根据句子意思选择正确的情态动词。
1.must和have to
两者都表示“必须”的意思,但must含有说话人主观上的看法、态度;have to则表示客观上的需要。
[考例]--Must we finish giving out the posters
today?
--Yes, we _______. It can't be put
off any longer. [太原市]
A. can
B. may
C. must
[答案]C。[解析] 此题考查情态动词的用法。回答由must引起的一般疑问句,其肯定答语要用must,不能用can或may。故选C。
-I didn't pass the math test. I
think I have spent too much time playing computer games recently.
--I agree. You __ play like that any more. [河南省]
A. needn't
B.
mustn't C.
may not
D.
wouldn't
[答案]B。[解析] 此处选mustn't。表示“一定不能”“千万不能”,用较强的语气来提醒对方不能再玩游戏了。
When traffic lights are red. We _________stop
and wait. [南京市]
A. may
B.
can
C.
must
D.
might.
[答案]C。[解析] 考查情态动词,must必须,表示禁止。
一I really like playing computer games! www.zk5u.co
一I'm
afraid you ________stop,for
your study and your health. [07宜昌市]
A. am B.
will
C.may D.must
[答案]D。[解析] 答语意思为“为了你的学习和健康,恐怕你必须停止玩电脑游戏”,所以must最恰当。