句型转换规则（讲义）通用版小学英语

句型转换主要规则 1、 肯定句变成否定句方法： 1. 在be动词（am, is, are, was, were...），情态动词（can, may, must...）后直接加not, 其它照抄，注意some变any, and变成or. is not = isn’t are not = aren’t was not = wasn’t were not = weren’t can not= can’t... 例： He can play the guitar. → He can’t play the guitar. They are singing in that room. → They aren’t singing in that room. There are some boys in the park.→ There aren’t any boys in the park. 练习： 把下列句子变成否定句 1） I am listening to music. →______________________________________ 2） Tom is a lovely student.→______________________________________ 3） Kate can clean the classroom.→______________________________________ 4） There are some flowers in the yard.→______________________________________ 5） We are sweeping the floor.→______________________________________ 2. 带有实义动词的肯定句变否定句时（一般现在时），要借助助动词do和does. 主语（非三单） + don’t + 动词原形 主语（三单）+ doesn’t + 动词原形 注意some变any, and变成or. 以后学到一般过去时，结构为主语+ didn’t + 动词原形 例：I like these toy ducks.→ I don’t like these toy ducks. Tom always goes to school by bus.→ Tom doesn’t always go to school by bus. 练习：把下列句子变成否定句（画主语，套结构） 1） We need some masks. →______________________________________ 2） They like making the puppet.→______________________________________ 3） Lily and Lucy live in a new house.→______________________________________ 4） Tom puts a book on my head.→______________________________________ 5） We play football on Sundays.→______________________________________ 6） Lucy likes listening to music.→______________________________________ 7） Mike has a pot.→______________________________________ 8） My mum has some nice coats.→______________________________________ 2、 陈述句变一般疑问句的方法： 1. 把be动词、情态动词放在句首，后接主语，其它照抄。注意你我互换，即I/we→, my/our→your；some→any； 点号→问号。一般疑问句的回答分为肯定回答和否定回答，遵循be动词问be动词答，情态动词问情态动词答，助动词（do/does）问助动词答的原则。 例： They are in the park. → Are they in the park? Yes, they are./No, they aren’t. He can play the piano.→ Can he play the piano? Yes, he can./No, he can’t. 练习：把下列句子变成一般疑问句 1）I am listening to music. →_______