4.03周一笔记.note
现在进行时：be动词 + 动词ing
疑问词做主语，谓语动词一般用单数
一般现在时：
谓语动词用原型，第三人称单数，谓语动词用复数
be going to do --- 根据迹象即将发生的事 将来时
have been to 去过，回来了
have gone to 去了，没回来
open 延续性时态 be open
否定句：
有be 动词则再后面加not
有助动词have/has 后面加not
we have flown in a plane 我们有坐过飞机
we have not flown in a plane //否定句
如果没有，就要加助动词：（doen/do/did）
he gets up at 7 everyday
He does not get up at 7 everyday //没有助动词，加助动词，动词变成原型He bought a ticket yesterday //他昨天买了一张票
He did not buy a ticket yesterday 有情态动词的，在情态动词后面之间加not
如：should //应该
We should eat more fruits //我们应该多吃水果
We should not eat more friuits //情态动词后面加not否定
1.Be 动词,在其后直接加not
He is not a doctor. I am not a student.
2.Has have 助动词,在其后直接加not
He has not been to Beijing. We have not flown in a plane.
3.情态动词，在后直接加not. should
We should eat more fruits. We should not eat more fruits.
4.加助动词 does/do/did He gets up at 7 everyday. He does not get up at 7 everyday.
He bought a ticket yesterday. He did not buy a ticket yesterday.