There are two tenses in English – past and present.
在英语里有两种时态—过去时和现在时。

The present tenses in English are used:
现在时在英语里：

to talk about the present
可以描述现在

to talk about the future
可以描述将来

to talk about the past when we are telling a story in spoken English or when we are summarising a book, film, play etc.
在口语中讲过去的故事或者在描述一本书、电影或者戏剧时，用现在时

There are four present tense forms in English:
英语里现在时有四种形式：

We use these forms:

to talk about the present:

He works at McDonald’s. He has worked there for three months now.

He is working at McDonald’s. He has been working there for three months now.
London is the capital of Britain.

to talk about the future:

The next train leaves this evening at 1700 hours.

I’ll phone you when I get home.

He’s meeting Peter in town this afternoon.

I’ll come home as soon as I have finished work.

You will be tired out after you have been working all night.

We can use the present tenses to talk about the past...