最让孩子头疼的莫过于时态了，我们经常说，学好时态，意味着一只脚已经跨入学好英语的大门。所以，家长一定要重视时态，务必把每个时态的用法弄清楚，并且能够做题。接下李爸来普及下进行时和过去进行时

现在进行时

我正在看电视。 I am watching TV now.

句型：主语+be（am，is，are）+现在分词～.

Look！Nancy is doing her homework 看！南希正在做作业。

They are cleaning their classroom. 他们正在打扫他们的教室。

She isn’t reading now.

过去进行时

He was walking in the park at that time yesterday 昨天那个时候，他正在公园散步。

句型：主语+be（was，were）+现在分词～.

I was watching TV then. 那时，我正在看电视。

When I came home， they were cooking in the kitchen. 当我进家时，他们正在厨房里做饭。

When he knocked at the door， we weren’t doing our homework.当他敲门时，我们没有在写作业。

Were you cooking at that time？ 那时，你在做饭吗？