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

今天，我们要习现在完成时和现在完成进行时。

The present perfect simple and continuous tenses.

现在完成时和现在完成进行时。

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

这些是现在完成时和现在完成进行时之间差异。

So it's just the present perfect with 'would' in front of it.

就是在“would”之后加现在完成时。

We use the present perfect and the present perfect continuous for both finished and unfinished actions.

我们用现在完成时现在完成进行时表示完成和未完成动作。

I've used the present perfect tense here.

我在这里用了现在完成时。

It's the present perfect and you can't use 'when' with the past simple and the present perfect.

这是现在完成时，“when”和一般过去时和现在完成时不能一起使用。

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

大概在这里，我们会用现在完成时。

Don't confuse this structure with the present perfect.

不要把这个结构和现在完成时混淆。

And so I have a lot of present perfect here.

所以我在这里使用了很多现在完成时。

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

同样地，这里我使用了现在完成时。

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

但是，有时现在完成进行时不可以使用，但现在完成时可以。

Answer this conditional and this present perfect question.

回答这个条件问句和这个现在完成时问句。

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

" How long" 经常用于现在完成时。

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

今天我们要复习现在完成时和过去完成时动词时态。

Okay, there has been, present perfect.

There has been，现在完成时。

What about present perfect to past perfect?

那么现在完成时变成过去完成时呢？

Here's the final use for the present perfect.

下面是现在完成时最后一种用法。

The word " have" in the phrase is part of the present perfect verb tense.

该短语中" have" 是动词现在完成时一部分。

Today, we'll look a tense which many of us struggle with, the present perfect simple.

今天，我们会习一个很多人都觉得很难时态，现在完成时。