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瑪麗看上去很累, 她昨晚做什么了? Mary _____ _______, what _____she _____ last night. 3 五、 助動詞 do 注意 : 1. 時態(tài)變化 : 現(xiàn)在時 →過去時: do→did 2. 人稱變化:第三人稱單數(shù):: do→does 3. 當句子出現(xiàn)助動詞 do 時,千萬要小心, 它后面的動詞必須用原型 。 4. 一個句子出現(xiàn)助動詞的情況: 1) 否定句: I don’t like playing football. 2) 一般疑問句: Does Mary often clean her room? 3) 特殊疑問句: What did you do last night? When do you go to school? How does Amy go to school? 5. 一個句子不需要出現(xiàn)助動詞的情況: 1) 肯定句: I like apples. 2) 有 be 動詞的否定句: I am not a girl. 3) 有 be 動詞的一般疑問句: Are you happy? 4) 有 be 動詞的特殊疑問句: What are you doing? Where are you? What time is it now? 6. 注意區(qū)分助動詞 do 與實義動詞 do 的區(qū)別: 助動詞 do 沒有實際的意思,只做結(jié)構(gòu)性詞語,實義動詞 do 是 “做 ”的意思 .。 如: do homework, do housework, do the dishes 練習鞏固: 用助動詞的適當形式填空: 1. ____ you do your homework last night? 2. We _____(否定形式 ) help her clean her room yesterday. 3. _____Jack do his homework every day? 4. How ______ your mother go to work? 5. _____ she often go swimming on the weekend? 6. When _______ you get up yesterday morning? 7. What _____ your father do? 8. Tom __________(否定形式 ) like playing football. 4 六 、 情態(tài)動詞: 我們現(xiàn)在學過的情態(tài)動詞有: can, will, would, may, must, should, shall。 情態(tài)動詞后動詞總是用原形 ,用法與助動詞 do 一樣