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人教2003课标版《Learning about Language》优质课PPT课件下载
B: I think you should start today.
C: No, you ought to start at once. (语气更强）
should / ought to的否定形式shouldn't/ought not to, oughtn't to表示“不应该”
Children shouldn’t smoke.
—How’s your tour around the North Lake? Is it beautiful?
—It ________ be, but it is now heavily polluted.
will B. would C. should D. must
What time ought I _______?
A．arrived B．arriving
C．arrive D．to arrive
He _______ speak to his mother like that.
A．ought not to B．doesn’t ought to
C．not ought to D．ought to not
have to
have to 表示客观需要去做的事情，意为“必须，不得不。”
e.g: I have to get the station early to catch the first train.
have to （考点）
have to 有时态,人称和数的变化。常见的有:
一般将来时 We will have to gather at the school gate at 7 tomorrow.
一般现在时 I have to take more money with me because my wife has so much to buy.
一般过去时 Finally, we had to give up our idea
Have to 的否定形式和疑问形式需要借助助动词do(don’t have to)
Eg:He has to leave her alone.（肯定句）
他不得不留她一个人
改句子：