Use be when you want to make a question in the present continuous or past continuous tense.

当你想以现在进行时或过去进行时提问时，使用be。

The present perfect simple and continuous tenses.

现在完成时和现在完成进行时。

They don't exist in continuous tenses.

它们不是以进行时态存在的。

There are six continuous tenses in English.

英语中有六种进行时态。

In this sentence, the future continuous tense is used.

这个句子使用了将来进行时。

Here, the first action is in the present continuous tense.

这里，第一个动作是现在进行时。

Should we use " while" only with continuous tenses?

我们用“while”的时候只能搭配进行时吗？

There is also the past perfect and past continuous tenses.

还有过去完成时和过去进行时。

When used with the verb " to be" , it forms continuous tenses.

当与动词 to be 连用时，它形成进行时态。

This is not a continuous tense. This is a past simple.

这不是进行时态。这是一般过去时。

For example, you may know the present perfect continuous tense.

例如，你可能知道现在完成进行时。

The verb " measure" is not used in continuous tenses in this sense.

动词“measure”在这个意义上不用于进行时态。

Lida rrr, you have to hear this continuous, tense sound and then a schwa.

你要听这个进行时，时态，然后是弱读音。

We use the present continuous tense to describe an action that is happening now.

我们用现在进行时来描述正在发生的动作。

But this is an action, you can use actions in continuous tenses.

但如果表示动作，就可以用现在进行时。

Then we have the verb, the everyday verb in the continuous tense; past, present, future continuous.

然后是它的动词形式，就是我们日常使用的进行时。包括过去、现在和将来进行时。

The verb " being" should be replaced with " been" to form the present perfect continuous tense correctly.

动词“being”应该用“been”代替，以形成正确的现在完成进行时。

And in that context, it's perfectly okay to use a continuous tense.

在这种语境中，使用进行时态是完全可以的。

So, we could have " While trying..." we'd actually remove the be verb for continuous tenses.

因此，我们可以说“While trying...”，实际上我们可以把动词变成进行时。

See, by using that future continuous tense, you put emphasis on a long time for that action.

看，通过使用将来进行时，你可以强调一个动作需要很长时间。