m7 unit 3 grammar and usage
auxiliary verbs
teaching aims:
1. to learn some basic information about linking-verbs.
2. to summarize common and important linking-verbs.
step one: definition
auxiliary verbs are used in forming tenses, moods and voices of other verbs. the verbs used for this purpose include be, do, have and modals.
step two: presentation
一、最常用的助动词be, have, do, shall, will, should, would
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