初中英语情态动词 can/must/should/may用法
can(能):I can swim.(能力)/ Can I help you?(请求)
must(必须):You must finish your homework.(义务)/ You mustn't run in the classroom.(禁止)
should(应该):We should help each other.(建议)
may(可以):May I come in?(允许)/ It may rain tomorrow.(推测)
need(需要):Need I go?(必要性)/ You needn't worry.(不必)
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