(1)dare作为情态动词,多用于否定句、疑问句或条件句中,无第三人称单数形式,只有一般现在时和一般过去时。
如:Dare he tell them what he knows?他敢告诉他们所知道的情况吗?I daren’t ask her – will you do it for me?我可不敢问她,你能帮我问问吗?
(2)dare作为实义动词,此时有人称、数及时态的变化。
如:He doesn’t dare to break his promise.他不敢食言。
注意:在口语中,dare的各种形式常与不带to的不定式连用。
如:Do you dare tell her what I said?你敢告诉她我说的话吗?
I didn’t dare look at him.我不敢看他。
7. shall的用法:
shall表示征求对方意见(多用于第一、三人称),如:Shall we go out for a walk?我们出去散步好吗?
在英语中,我们可以用其他多种方式提出我们的建议或征求对方意见。
(1)用“Let's do...”来提出建议。
如:Let's go for a walk after supper.
(2)用“What/How about...?”来提出建议;about后接名词或动词ing形式。
如:What about/How about a drink? What about/How about taking Tom with us?
(3)用“Why not...?”来提出建议,表示“何不……”not面后接动词原形。“Why not...?”实际上是“Why don't you/we...?”的简略形式。
如:Why not meet at the school gate at eight? Why don't we stay here another day?
(4)用“Would you like...?”来提出建议,意思是“你想要……吗?”Would you like后可接名词或不定式。
如:Would you like a cup of tea? Would you like to go and see her?
因此,如果我们说:“去游泳好吗?”英语中可有这样几种表达法:Shall we go for a swim? Let's go for a swim,shall we? What about/How about going swimming? Why not go for a swim? Would you like to go for a swim? What do you think of going for a swim?
8. should的用法:
(1).should意为“应该”,可表示劝告、建议、义务、责任等。
如:We should protect the environment.我们应该保护环境。
(4)Should have done表示对过去动作的责备、批评。
如:You should have finished your homework.
你应该已经完成作业了。(事实上你没有完成。)
9. will的用法:
will表示意愿、意志、打算,可用于多种人称。如:I will help you if I’m free this afternoon.今天下午如果我有空,我就会帮你。
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