The present perfect is covered in Unit 8.
现在完成时在第8单元讲解。
'I have eaten' is the present perfect tense of the verb 'to eat', 'I had eaten' is the past perfect and 'I will have eaten' is the future perfect.
Ihave eaten是动词eat的现在完成时；Ihad eaten是过去完成时；Iwill have eaten是将来完成时。
To grasp the usage of the present perfect tense.
掌握现在完成时态的用法。
Talk about the uses of the present perfect tense.
表示过去发生的事对现在仍有影响。
French tense to the present perfect tense in English.
法语中没有和英语的现在完成时完全对应的时态。
The present perfect is almost a kind of present tense.
现在完成时总是一类现在时态。
I have finished 'is an example of the present perfect.
“我已经完成了”是现在完成时态的一个例句。
When we use the present perfect, there is a connection with now.
当我们使用现在完成式时，是和现在有关联的。
You'll be able to use the present perfect tense for checking up.
你可以用现在进行时态去检查。
In this lesson, we will practice using the present perfect tense.
在这节课上，我们将要练习使用现在完成式。
It is not easy to learn to use the present perfect tense correctly.
学习正确使用现在完成时不是容易的事。
Rewrite the following sentences using the present perfect passive voice.
用现在完成时的被动语态改写下列句子。
Today, we are going to talk about the present perfect continuous tense.
今天，我们谈谈什么是现在完成进行时。
Fill in the blanks with the present perfect tense of the verbs in brackets.
用括号里动词的现在完成时态来填充空格。
We also use the present perfect to talk about repeated actions in the past.
我们还使用此时态谈论过去重复的动作。
The present perfect tense emphasizes the effect of the past action on the present.
现在完成式强调过去所发生的事情对现在的影响。
There is no exactly equivalent French tense to the present perfect tense in English.
法语里没有和英语中的现在完成时完全对应的时态。
Change these sentences into the present perfect passive putting the verbs into the correct forms.
用动词的正确形式将下面的句子变成现在完成时的被动语态。
When we talk about past events which have no present importance, we do not use the present perfect.
谈论过去的事件其对现在不重要，不用现在完成时。
For example, try to write down each example of a form you are studying such as the present perfect.
比如，列出你正在学的语法知识的全部形式，如现在完成时。
We use the present perfect tense to talk about something that happened at an indefinite time in the past.
我们使用现在完成时谈论发生在过去某个不确定的时间的事情。
When talking about current employment be careful to use the present perfect or present perfect continuous.
谈起目前的就业要小心使用现在时。
The present perfect is used to express an action that started in the past but still continues in the present.
现在完成时用来表达开始于过去但仍在现在持续的动作。
The present perfect simple is often used to talk about past actions and events which are completely finished.
一般现在完成时经常用于谈论过去的行为和事件其完全结束。
When we make a present perfect sentence, we could usually make a present tense sentence about the same situation.
造现在完成时的句子，我们通常会造现在时态的句子。
We also use the present perfect to talk about a series of repeated actions which have happened up to the present.
我们也使用现在完成时谈论一系列重复的行为，这些行为到现在还发生。
We also use the present perfect to talk about a series of repeated actions which have happened up to the present.
我们也使用现在完成时谈论一系列重复的行为，这些行为到现在还发生。
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