1 新概念一主要语法知识点（一）时态主要涉及的时态有：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。?含有 be 动词的句子例： 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 ·例： 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例： 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例： Yes, he is. No, he is not. Yes, she is. No, she is not. Yes, they are. No, they are not. ?不含有动词的句子，即含有一般动词的句子第三人称单数及单数名词例： He likes books. She likes him. The dog likes bones. ★变 疑问句 在句首 加 does, 动词变为原型例： 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 , 动词变为原型例：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：例：Yes, he does. No, he doesn’t.Yes, she does. No, she doesn’tYes, 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例： I want to have a bath. We have some meat. The students like smart teachers. ★变 疑问句 在句首 加 do例： 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 . 例： You do n’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例：Yes, I do. No, I don’t.Yes, we do. No, we don’tYes, they do. No, they don’t.2. 现在进行时表示现在正在进行的动作。构成：主语＋ be 动词＋动词的现在分词＋其它成分例： We ...
