牛津譯林版高中英語選修七unit 3《the world online》（grammar）課件(文件)
【正文】 tside. It must have rained yesterday. ? So it must be slippery outside. Do be careful! ? You needn39。 3) will用于第二人稱疑問句中 ,詢問對(duì)方意志或請(qǐng)求。 can, could 表示能力 ,相當(dāng)于 be able to。 4. modals（ shall/should/will/would/can/ could/may/might/must/need/dare） Auxiliary verbs Tip: 5) must表示必須、義務(wù)等 ,強(qiáng)調(diào)主觀因素 , have to, 強(qiáng)調(diào)客觀因素。 must+原形動(dòng)詞表示對(duì)現(xiàn)在情況的推斷。 5. A phrasal auxiliary verb（ have (got) to, had better/would sooner/rather (… than)/cannot (help) but/be (not) to/be supposed to/ought to/used to/be about to/be able to） Auxiliary verbs 5. A phrasal auxiliary verb Auxiliary verbs ? It’s getting late. I’ve (got) to go now. ? You don’t have to take off your shoes. ? Many countries would rather be cautious with this new technology. ? The tickets had been sold out, so I could not (help) but go back home. ? The children are supposed to be at school before 8 . 5. A phrasal auxiliary verb Auxiliary verbs ? I used to love cats but not now, because I was once attacked by a big black cat. ? He didn’t use to smoke when he was younger. ? Did he use to e as often as he does now? Answers to Part A (p41) 1. have 2. haven’t 3.
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