He wants to know what situation calls for use of the perfect tense.
他想知道在什么情况下需要用完成时态。
The present and past perfect tenses both belong to the perfect tense.
现在完成时和过去完成时都属于完成时态。
The present perfect is almost a kind of present tense.
现在完成时总是一类现在时态。
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。
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。
To grasp the usage of the present perfect tense.
掌握现在完成时态的用法。
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。
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。
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。
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。
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。
Talk about the uses of the present perfect tense.
表示过去发生的事对现在仍有影响。
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。
Comparison Compare the difference between the simple past tense and the present perfect tense.
现在完成时与一般过去时所表示的动作或状态都发生在过去，区别…
Comparison Compare the difference between the simple past tense and the present perfect tense.
现在完成时与一般过去时所表示的动作或状态都发生在过去，区别…
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