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模块七 Module VII Improving our lives《Grammar and usage(1)： Auxiliary verbs》集体备课PPT课件优质课下载
Step 1 Checking students' preview
He did not find any useful information on the Internet.
★We are having an English class.
★ I have seen the film.
★ He didn’t go home last night.
★ We will fly for Africa next month.
帮助主要动词have构成现在进行时
帮助主要动词see构成现在完成时
帮助主要动词go构成一般过去时
帮助主要动词fly构成一般将来时
1.What’s the function of the underlined words?
Step 2 Introduction
★ He was sent to England.
★I would fly to Sweden if I were a bird.
★Had I lived in London, I would have been to London Bridge.
1. What’s the function of the underlined words?
帮助主要动词send构成被动语态
帮助主要动词构成虚拟语气
小结:助动词和其他动词一起构成时态、语气和语态。可以用作助动词的有be、do、have和情态动词。
帮助主要动词构成虚拟语气
★ We have/need to go home now.
★Students must study hard.
2. What’s the function of the underlined modals?
表示必要性
表示职责