Ambush is always preferable when the terrain presents perfect color.

周边环境理想时，狮子更喜欢打伏击战。

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

同样地，这里我使了在完成时。

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

大概在这里，我们在完成时。

We can also describe a recent change in the economy using the present perfect.

我们也可以在完成时来描述最近的经济变化。

The present perfect simple and continuous tenses.

在完成时和在完成进行时。

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

" How long" 经常于在完成时。

Americans also tend to use the simple past tense while Britons use the present perfect.

国人依然倾向于一般去式，而英国人依然在完成式。

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

所以你在完成时或在完成进行时来回答。

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

今天我们要复习在完成时和去完成时动词时态。

Other grammar experts have explored the present perfect in a slightly different way.

其他语法专家以一种略微同的方式探索了在完成时。

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

这些例子向你展示了在完成时的一般法。

A couple of weeks ago, I created a lesson about the present perfect tense.

几周前，我做了一个关于在完成时的课程。

More specifically, her use of present perfect is sometimes incorrect or awkward.

更具体地说，她对在完成时的使有时是正确的或尴尬的。

" Oh my god. Have you been to Brazil? That's present perfect by the way."

“哦买噶，你去巴西？顺便说一下，这是在完成时。”

Please make a sentence using the present perfect tense.

请以在完成式的时态造句。

You need present perfect simple, not continuous, to speak about the result of your day.

你需要使在完成时，而是进行式，来谈论你一天的结果。

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

今天，我们学习一个很多人都觉得很难的时态，在完成时。

Sentence one uses the simple past tense. Sentence two uses the present perfect tense.

第一句的是一般去时，第二句的是在完成时。

Don't confuse this structure with the present perfect.

要把这个结构和在完成时混淆。

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

要使在完成时，它表示动作仍在进行。