1.一般现在时
（1）表示现在的或一般的情况或状态:
I'm sorry I' late.对不起我迟到了.
You speak good English.你英文讲得很好.
He is very tired.他现在很疲倦.
（2）表示经常或习惯性的动作：
We often write to each other.我们时常通信.
She works very hard.她很用功.
They go jogging every day.他们每天跑步.
（3）间或表示将要发生的情况（仅限于少数动词）：
What time do we arrive in Shanghai?我们什么时候到达上海?
The train leaves at 2:30.火车两点半开.
2.现在进行时
（1）表示现在进行的动作：
I'm waiting for the bus.我在等公共汽车.
She's sitting in an armchair.她正坐在沙发椅上.
What are these people doing?这些人在干什么?
（2）预计将要发生的动作（仅限于少数动词）：
Tomorrow they're going to New York.明天他们将动身去纽约.
My cousin is arriving next week.我表弟下星期到.
3.be going to结构表示“打算做某事”或“即将发生某事”：
Miss Green is going to wear a blue dress.格林小姐打算穿一件蓝色连衣裙.
I'm afraid it's going to rain.恐怕要下雨了.
4.一般过去时
表示过去发生的事：
Where were you yesterday?你昨天去哪里了?
How long did you stay here?你在这儿待了多久?
Did you sleep well?你睡的好吗?
终于写完了,