19现在时态表达将来（I am doing/I do）

1.用现在进行时表达将来：
This is Tom's diary for next week.
He is playing tennis on Monday afternoon.
He is going to the dentist on Tuesday morning.
He is having dinner with Ann on Friday.

在这些例子中，Tom已经决定并且安排好了要去做这些事情。这里是用现在进行时来表达已经安排好要去做的事情，而不能用一般现在时表达。

A:What are you doing on Saturday evening?这个时候不可以用what do you do
B:I'm going to the theatre. 不可用I go
A: What time is Kathy arriving tomorrow?
B: At 10.30. I'm meeting her at the station.
A: I'm not working tomorrow, so we can go out somewhere.
B: Ian isn't playing football on Saturday. He's hurt his leg.
以上例子我们也可以用I'm going to do…来表达。
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但是我们不能用will来表达已经安排好要去做的事情：
What are you doing this evening? 不可用will
Alex is getting married next month.不克用will

2.用一般现在时表达将来：
我们通常用一般现在时来表达时间表，项目方案，公共交通时刻表以及电影档期等等：
-The train leaves Polymouth at 11:30 and arrives in London at 14:45.
- What time does the film begin?
- It's Wednesday tomorrow.

可以用一般现在时表达个人已经确定下来的日程:
- I start my new job on Monday.
- What time do you finish work tomorrow?

但是用现在进行时来表达个人安排更常见:
What time are you meeting Ann tomorrow?

比较下面的句子:
-What time are you leaving tomorrow?
But-What time does the train leave tomorrow?
- I'm going to the cinema this evening.
But- The film starts at 8:15( this evening).