内容正文:
中考英语复习---情态动词 词
情态动词:can, could, may, might,must,ought to, shall, will,would, need ,dare表示说话人的情感和态度。 不受主语人称和数的变化影响;和动词的原形一起构成谓语。
情态动词的基本用法
1. 表能力,can/be able to代替。can只有两种时态形式,现在式can和过去式could,而be able to有多种时态形式。be able to也可表达能力,但常用来表达在某件事情中所表现出来的能力,尤指克服困难能够完成某事。
Mary can play the piano. She has been able to play it since she was 5.玛丽会弹钢琴。她五岁起就会弹了。
2.表允许。
Can I have a look at your new pen? 我可以看一看你的新钢笔吗?
He asked whether he could take the book out of the reading—room.他问他可不可以把书带出阅览室。
3.表委婉。Could/ would
Can (Could) you lend me a hand? 帮我一把好吗? Would you like another glass of beer? 再来杯啤酒好吗?
Would you mind cleaning the window? 请把窗户擦一下好吗?
4.表可能. May He may be at home. 他可能在家。=Meybe he is at home.
She may not know about it. 她可能不知道这件事。
5.表意志。must和 have to “必须” must表示主观意志,而have to表示由于客观因素不得不做某事。must没有过去式,除在间接引语中可用于表示过去时间,在直接引语中表示过去时间应该用had to代替。
I told her that she must give up smoking. 我叫她必须戒烟。We had to get everything ready that night. 我们那晚得把一切准备就绪。
--Must we hand in our exercise—