have to
must
♦She has to help her mother do the housework at home.她不得不在家帮助 妈妈做家务。 ♦We had to stay at home because it rained.因为下雨,我们不得不待在家里。 ♦We must leave now. 我们现在必须离开。 ♦He must look after his things. 他必须照看好他的东西。
12.(2015〃扬州中考)—You look pretty in green,
Kate.
—Thank you.I like green.Green
energy. A.can B.must C.shቤተ መጻሕፍቲ ባይዱuld D.has to
give me
A [提示:考查情态动词辨析。句意为“你穿上 绿色的衣服看起来漂亮,凯特。”“谢谢你。我 喜欢绿色。绿色能给我能量”。can能;must必 须;should应当;has to不得不。根据句意,故选A。]
14.(2015〃乐山中考)—Mom,the train is leaving in eight minutes.I go now. —Okay,Jim,call me when you get there.
A.may
B.must
C.can
B[提示:考查情态动词的用法。句意为“妈妈,火 车八分钟后就要离开了。我必须现在就走。” “好的,吉姆,当你到那里时,给我打个电话”。 由句意可知,选B。]
3.have to不能直接用来表示 否定或进行提问,需要借助助 动词;must的一般疑问句将其 提前即可。
♦Must he do his homework now? 他必 须现在做作业吗?