Unit 2 Robots —— Grammar
动词不定式的被动语态
一、复习各种时态被动语态★ 被动语态基本结构: be+ done (以 the book , publish 为例) 普通现在/过去时: The book ____________________. 普通/过去未来时: The book _________________________. The book __________________________. 现在/过去进行时: The book __________________________. 现在/过去完成时: The book ___________________________. 情态动词: The book _______________________________.
is/ was published
will/would be published
is/was going to be published
is/was being published
has/had been publi ...


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