语法 情态动词 may 表示:推测 “可能” may do / may have done 情态动词 can 表示: 能力 “能,能够” 情态动词 could 表示:过去,如果是现在表示比较委婉
解释 1、疑问句中 may 只能接主语【 I 】 , 陈述句中可以接 I / You/ They 等 2、疑问句中或者陈述句中, can 主语可以接 I / You/ They 等 3、may限制人称 4、can不限制人称
情态动词 may ‘The play may begin at any moment,’ 【表允许】 I said. ‘It may have begun already,’ Susan answered. 【表允许】 May I do sth.? “可以吗?”【表请求】
情态动词 can Trust yourself! You can do it. 请求允许? “可以吗?” 允许。 “可以” A: Can I help you? / What can I do for you? B: You can help me to find my size. 推测(常用于否定)can’t / couldn’t“不可能” He is abroad. It can’t be him.
情态动词 can( could )小结 能力 “能,能够” 请求允许? “可以吗?” 允许。 “可以” 推测(常用于否定)can’t / couldn’t“不可能” ‘Can I return these two tickets?’ he asked. ‘Certainly,’ the girl said.
练习
With the help of the new technology, you _____ e-mail your friends by mobile phone. (中考真题) A can B must C need D should 解析:答案选 A。can:能够; must:必须; need 需要; should 应该 这句意为:在新科技的帮助下,你能用手机给你的朋友们发邮件。
Have you decided which senior high school to choose? Not yet. I _____ go to Moonlight School. (中考真题) A must B may C need D should 解析:答案选 B,关键就在于题干中的 Not yet,还没有呢,所以是不确定的语气.must 是必 须一定的意思;need 是需要;should 是应该;may 表示可能性。根据题意:还不确定呢, 我可能回去月光中学。
How’s your new babysitter? We _____ ask for a better one. All our kids love her so much.(高考真题) A should B might C mustn’t D couldn’t 解析:答案选 D。题目意为:你家的新保姆怎么样?我们简直不能找到更好的了,我所有孩 子都喜欢她。根据后半句,所有的孩子都很喜欢她,应该选不能 couldn’t.
This TV program is quite boring. We _____________ (不妨听听音乐) . (四级翻译真题) 解析:might listen to the music as well. may as well/ might as well 不妨…;不如…