The present perfect simple and continuous tenses.

完成时完成进行时。

Today we are looking at the present perfect, and the present perfect continuous.

今天，我们要学习完成时完成进行时。

The present perfect is often associated with a number of adverbs.

完成时经常很多副词连用。

Those are the differences between the present perfect and the present perfect continuous.

这些是完成时完成进行时之间的差异。

I've used the present perfect tense here.

我这里用了完成时。

Probably here, we would use the present perfect, right?

大概这里，我们会用完成时。

Don't confuse this structure with the present perfect.

不要把这个结构完成时混淆。

And again, I've got your present perfect here.

同样地，这里我使用了完成时。

However, sometimes the present perfect continuous cannot be used but the present perfect simple can.

但是，有时完成进行时不可以使用，但完成时可以。

Okay, there has been, present perfect.

There has been，完成时。

And so I have a lot of present perfect here.

所以我这里使用了很多完成时。

" How long" is often used with the present perfect verb tense.

" How long" 经常用于完成时。

So you would respond using the present perfect or the present perfect continuous.

所以你会用完成时或完成进行时来回答。

These examples show you general ways in which the present perfect is used today.

这些例子向你展示了完成时的一般用法。

Use the present perfect and it'll indicate the action is still going on.

要使用完成时，它会表示动作仍进行。

And we could also use the continuous form of the present perfect here.

我们还可以这里使用完成时的进行时。

This example shows you a general way in which the present perfect is used.

这个例子向你展示了完成时的一般用法。

But the present perfect had different uses in the past.

但是完成时过去有不同的用法。

Answer this conditional and this present perfect question.

回答这个条件问句这个完成时问句。

Today we are reviewing the present perfect and past perfect verb tenses.

今天我们要复习完成时过去完成时动词时态。