请看下列例句：

A: there’s a new restaurant in George Street.

B: yes, I know. I've heard it's very good.

1.第一次谈论到某事物时，用there...表明它的存在：

There’s a new restaurant in George Street.

在乔治街上有一个新的餐馆。

I’m sorry I'm late. There was a lot of traffic.

抱歉我迟到了。 刚才非常堵车。

Things are more expensive now. There has been a big rise in the cost of living.

物价越来越贵了。生活成本大幅提高。

it 则用来指某个特定的东西、地点、事实、情形等

We went to the new restaurant. It’s very good.

我们去了那个新餐馆，它很不错。

I wasn’t expecting them to come. It was a complete surprise.

我没想到他么能来，这真是个惊喜。

请比较there和it：

I don’t like this town. There's nothing to do here. It’s a boring place.

我不喜欢这个城镇。这没什么可做的。这是个无聊的地方。

注意，there也可以指 “在那儿”

When we got to the party, there were already a lot of people there. (=at the party)

我们到达派对的时候，已经有很多人在那儿了。

2. 可以说there will be/there must be/ there might be/ there used to be等

Willyou be busy tomorrow? Will there be much to do ?

你明天会很忙吗？有很多事要做吗？

“Is there a flight to Rome tonight?” “There might be. I’ll check the website.”

今晚有去罗马的航班吗？ 可能有，我需要查一下网站。