【创新思维】2018-2019学年人教版高一英语必修3课件：Unit 2 Period 3 Grammar-302edu教育资源网

1、重温情态动词的语法特征。 2、掌握情态动词ought to, ought not to, have to, don't have to, mustn't , needn't. 3、懂得区分should 和ought to , 区分needn't 和mustn't 。

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