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中考英语核心考点解析：助动词

1.助动词be的用法

(1)与现在分词构成进行时态

He is singing.

他在唱歌。

They were having a meeting at ten yesterday morning.

他们昨天上午十点正在开会。

(2)与过去分词构成被动语态

This kind of car is made in Beijing.

这种汽车是北京制造的。

Were the kids taken good care of?

孩子们被照顾好了吗?

He is being carried.

他正被抬着。

(3)“be +不定式”表示未来的计划或安排，还可表示命令或约定。

The train is to leave at ten.

火车10点钟开。

You are to explain this.

对此你要做出解释。

2.助动词have 的基本用法

(1)与过去分词构成完成时态

I have finished my homework.

我已经完成我的作业了。

The train had left before he got to the station.

在他到达车站之前火车已经开走了。

(2)与“been + 现在分词”构成完成进行时态

It has been raining the whole morning.

整个上午都在下雨。

(3)与“been +过去分词”构成完成时态的被动语态

The story has been told in China for many years.