你的笔老是掉地上。
Your pen often falls down on ground.

The pen fell down just now.

明显的时间状语
yesterday.

last year

The day before yesterday

I was born in 1987.

You are watching me. I am teaching you now.

What were you doing at four thirty yesterday afternoon?

What did you do yesterday?

过去某一点之前发生的动作。过去完成时。
将来某一点发生的动作，将来进行时。

时间点：
4:30之前 昨天4:30 2:30 明天3：30
过去完成时 过去进行时 现在进行时 将来进行时。

过去时的语法，
主语+过去式。

He cut his finger.

及物动词/不及物动词
规则动词/不规则动词
延续性动词/非延续性动词

她经常写信
She writes
她经常读书。
she reads.
她经常睡觉。
She sleeps.

轻辅音结尾读t
A person stopped me yesterday.

以t和d结尾的读 id
wanted
needed

beat beat beaten [in]
put put put
go went gone

He beat me up yesterday.
buy bought bought

come came come.

He has come. 他来了。
he comes.他经常来
He came the day before yesterday. 他前天来了。

轻辅音结尾读[t]
I thanked him just now.

He went yesterday.

Did he go there yesterday?
He didn't go there yesterday.

你今天早上吃的啥？
What did you have this morning?
What did you eat this morning?

没有明显的时间状语，完成时。
有明显的时间状语，过去时。
Have you had?

Have you had your breakfast?

过去时也可以省略时间状语。
Did you have your breakfast(this morning)?

What did you say(just now)?

教室里的男孩
The boy (in the classroom)定语.

The day (before yesterday)定语

last year 去年
last week 上周
last winter 去年冬天

2 weeks ago 两周以前

in 1968 在1968年。

He　came here 3 hours ago.

Before 一点时间（时间点）
一段时间 ago

I worked here before liberation.

Does your daughter often come to China?
No she doesn't.

did强调句型。 确实。
She did often come last year.
I did study English last year.
I did go there yesterday.

I was ill yesterday.

My pen was on the desk yesterday.

My cellphone was here just now.

I am a little tired because I was busy this morning.

I am very tired.

我太累了没法走路了。
I am too tired to move.

小孩年纪太小了，没法上学。
This boy is too young to go to school.

What happened to you?
My teacher ordered stay in the classroom.

Thank you.

Don't thank me at all.
Not at all.

You are late.
I am not late at all.
Not at all.

There was building last year.

What did you do last year?
I was a doctor last year.

I was a father.
I will be a father.