新概念：新概念英语第一册语法总结(一)

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　　新概念：新概念英语第一册语法总结(一)
　　一、时态：
　　一般现在时，现在进行时，一般过去时，现在完成时，一般将来时，过去进行时，过去完成时，过去将来时
　　1. 一般现在时
　　表示一般性，经常性的动作或一般性事实。
　　1 含有be动词的句子
　　He is a teacher.
　　The girl is very beautiful.
　　Tim and Jack are students.
　　★变疑问句将be动词移到句首
　　Is he a teacher?
　　Is the girl very beautiful?
　　Are Tim and Jack students?
　　★变否定句在be动词后面加not
　　He is not a teacher.
　　The girl is not very beautiful.
　　Tim and Jack are not students.
　　★肯定回答及否定回答
　　Yes, he is. No, he is not.
　　Yes, she is. No, she is not.
　　Yes, they are. No, they are not.
　　★不含有be动词的句子，即含有一般动词的句子
　　第三人称单数及单数名词
　　He likes books.
　　She likes him.
　　The dog likes bones.
　　★变疑问句在句首加does, 动词变为原型
　　Does he like books?
　　Does she like him?
　　Does the dog like bones?
　　★变否定句在主语及动词之间加doesn’t, 动词变为原型，原句中的动词不再有第三人称变化。
　　He doesn’t like books.
　　She doesn’t like him.
　　The dog doesn’t like bones.
　　★肯定回答及否定回答：
　　Yes, he does. No, he doesn’t.
　　Yes, she does. No, she doesn’t
　　Yes, it does. No, it doesn’t.
　　注意：第三人称单数形式一般在动词后面加S，不要和名词复数混淆，变否定句或疑问句时名词复数没有任何变化。
　　其他人称及复数名词
　　I want to have a bath.
　　We have some meat.
　　The students like smart teachers.
　　★变疑问句在句首加do
　　Do you want to have a bath?
　　Do we have any meat?
　　Do the students like smart teachers?
　　★变否定句在主语和动词之间加don’t.
　　You don’t want to have a bath.
　　We don’t have any meat.
　　The students don’t like smart teachers.
　　★肯定回答及否定回答
　　Yes, I do. No, I don’t.
　　Yes, we do. No, we don’t
　　Yes, they do. No, they don’t.