初中英语语法——一般现在时知识点总结归纳
一般现在时——表示一般性，经常性的动作或一般性事实。 概念:表示经常发生的动作或经常存在的状态。
常和 always , often , usually , sometimes , every day 等表时间的状语连用。 如：1) I go to school every day . 我每天都去学校。(表经常) 2) He is always like that . 他总是那样。(表状态) 构成：1) 主语 + be (am / are / is ) +…… 2) 主语 + 实义动词/三单动词 + … 【解析】
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.
2、不含有be动词的句子，即含有一般动词的句子。 (1)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。 (2)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.