23 I will和I'm going to的区别

Sue:Let's have a party.
Helen:That's a great idea. We'll invite lots of people.
Later that day,Helen meets Dave：
Helen: Sue and I have decided to have a party. We are going to invite lots of people.

我们用will来表示说话的时候产生念头要去做的事情。上面这段对话中，Sue和Helen谈话之前没有决定要开party并邀请很多人参加，这是一个新的主意。

Helen遇到Dave的时候用be going to来表达说话前已经决定要去做的事情。Helen在跟Dave说话之前已经跟Sue一起决定了要邀请很多朋友参加她的party。

比较下面的对话：
'George phoned while you were out.'
'Ok, I will phone him back.'
but
'George formed when you were out? '
'Yes, I know i'm going to phone him back.'

'Ann is in hospital.'
'Oh, really? I didn't know. I'll go and visit her.'
bit
'Ann is in hospital. '
'Yes, I know. I'm going to visit her tomorrow.'

对于表达将来要发生的事情和状况，比如说预计未来，两者的区别很小哈，比如说你可以说：
I think the weather will be nice later.
I think the weather is going to be nice later.

但是当我们是基于现在的客观情况对未来作出判断的时候，我们通常说something is going to happen：
Look at those black clouds. It's going to rain.
I feel terrible. I think i'm going to be sick.
以上这两种情况就不可以用will，如果不记得了，请回听unit20

当用于表达主观意愿的时候，我们更多用will：
Tom will probably arrive at about eight o'clock. I think Ann will like the present we bought for her.
我们在上一次课里有提到过哪些表示主观意愿的词出现的时候通常用will，大家可以回听一下。