Unit 3 Grammar and usage 课件 2020-2021学年高中英语牛津译林版选修七

Do you know the singer in the video? Michael Jackson What song was he singing in the video? He was singing Heal the World. What else can you see in the video? I can see many children. What were the children singing at the beginning of the video? They were singing We Are the World. Do you know the singer in the video? What else can you see in the video? What song was he singing in the video? What were the children singing at the beginning of the video? Auxiliary verbs [ɔɡˈzɪljəri] Unit 3 The world online Grammar & usage Auxiliary verbs [ɔɡˈzɪljəri] Auxiliary verbs are used in forming tenses, moods and voices of other verbs. Verbs used for this purpose include be, do, have and modals(情态动词). Auxiliary verbs are also used to form negative(否定), interrogative(疑问) sentences, or for inversion(倒装), emphasis(强调). What are auxiliary verbs? 时态 语气 语态 Tenses 1. 世界人口增长十分迅速。 The population of the world ____ increasing very fast. 2.你昨天晚上十点在做什么？ What _____ you doing at 10:00 last night? 3.我不知道我们现