时态：就是谓语动词的形式

1、时态的分类

A、一般时：表示经常发生的动作；进行时：表示正在进行的动作；完成时：表示已经完成的动作。

B、过去时：用于表示过去发生的动作；现在时：用于表示现在发生的动作；完成时：用于表示已经完成的动作。

2、常用的九种时态（以clean为例）

A、 一般现在时

谓语构成：clean（主语是第三人称单数时为cleans）

用法：表示（现在、现阶段）经常发生的动作。如：He cleans the classroom everyday.

基本句型：   肯定句：He cleans the classroom everyday.

否定句：He doesn’t clean the classroom everyday.

疑问句：Does he clean the classroom everyday?

答：Yes, he does.    No, he doesn’t.

B、 现在进行时

谓语构成：am cleaning, is cleaning, are cleaning

用法：表示现在(现阶段)正在发生的动作。如：He is cleaning the classroom.

基本句型：   肯定句：He is clean the classroom.

否定句：He isn’t cleaning the classroom.

疑问句：Is he cleaning the classroom ?

答：Yes, he is.    No, he isn’t.

C、 现在完成时

谓语构成：have cleaned, has cleaned（主语是第三人称单数）

用法：表示过去某时发生并一直持续到现在的动作。如：He has cleaned the classroom..

基本句型：   肯定句：He has cleaned the classroom.

否定句：He hasn’t cleaned the classroom

疑问句：Hs he cleaned the classroom ?

答：Yes, he has.    No, he hasn’t.

D、一般过去时

谓语构成：cleaned

用法：表示过去发生的动作。如：He cleaned the classroom yesterday.

基本句型：   肯定句：He cleaned the classroom yesterday.

否定句：He didn’t cleaned the classroom yesterday.

疑问句：Did he cleaned the classroom yesterday?

答：Yes, he did.    No, he didn’t.

E、 过去进行时

谓语构成：was cleaning, were cleaning

用法：表示过去某时正在发生的动作。如：He was cleaning the classroom at 6 o’clock last evening.

基本句型：   肯定句：He was cleaning the classroom.

否定句：He wasn’t cleaning the classroom.

疑问句：Was he cleaning the classroom?

答：Yes, he was.    No, he wasn’t.

F、 过去完成时

谓语构成：had cleaned

用法：表示过去某时之前已经完成的动作。如：He had cleaned the classroom before he went home.

基本句型：   肯定句：He had cleaned the classroom.

否定句：He hadn’t cleaned the classroom.

疑问句：Had he cleaned the classroom?

答：Yes, he had.    No, he hadn’t.

G、一般将来时

谓语构成：will clean, shall clean

用法：表示将要发生的动作。如：He will clean the classroom this afternoon.

基本句型：   肯定句：He will clean the classroom this afternoon.

否定句：He will not clean the classroom this afternoon.

疑问句：Will he clean the classroom this afternoon?

答：Yes, he will.    No, he won’t.

H、 将来进行时

谓语构成：will be cleaning, shall be cleaning

用法：表示将来某时正在发生的动作。如：He will be cleaning the classroom at 6 o’clock this afternoon.

基本句型：   肯定句：He will be cleaning the classroom.

否定句：He will not be cleaning the classroom.

疑问句：Will he be cleaning the classroom?

答：Yes, he will.    No, he won’t.

I、   将来完成时

谓语构成：will have cleaned, shall have cleaned

用法：表示将来某时之前已经完成的动作。如：He will have cleaned the classroom by 6 o’clock tomorrow afternoon.

基本句型：   肯定句：He will have cleaned the classroom.

否定句：He will not cleaned the classroom.

疑问句：Will he have cleaned the classroom?

答：Yes, he will.    No, he won’t.

（待续）