1.keep +形容词 . Keep quiet,please.
2.keep+sth/sb +形容词 We should keep the classroom clean.
3.keep +doing 一直做某事 Don't give up, Keep trying.
4.keep ... from doing ... 阻止做某事。。。The zoo can keep the animals from going extinct.
5.keep a pet 饲养一个宠物 My son keeps a cat .
6.keep指借。How long may I keep this book ？
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