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The present perfect is covered in Unit 8. 现在完成时在第8单元讲解。
The verb must be in the present perfect tense. 动词必须用现在完成时态。
To grasp the usage of the present perfect tense. 掌握现在完成时态的用法。
Explain and illustrate the main use of the present perfect tense. 解释并举例说明现在完成时态的用法。
Sometimes the past simple and the present perfect are confused. 有时一般过去时和现在完成时是混淆的。
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。
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。
And will learn The simple past tense, The present perfect tense, The past perfect tense as well as The future tense. 这个学期，我们学到了过去时，现在完成时，过去完成时和将来时等。
To grasp“ the Present Perfect” and the Irregular verbs’ past tense& past participle tense. 掌握现在完成时态以及不规则动词的过去时态和过去分词。
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。
Today we are going to revise the simple past tense and the present perfect tense. 出示表格和图片,区分一般过去时和现在完成时。
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。
This is the key to understanding the difference between the past simple and the present perfect. 这是一个了解一般过去时和现在完成时之间区别的关键。
The present perfect is used to express something that happened at an unspecified moment in the past. 现在完成时被用于表示在以前一个未指明的时候发生的事。
The verb is in the present tense. 这个动词使用的是现在时态。
To grasp “the Present Perfect” and the Irregular verbs' past tense &past participle tense. 掌握现在完成时态以及不规则动词的过去时态和过去分词。
The present law makes no provision for this. 现行的法律对此未作任何规定。
We use the present perfect tense to talk about things that started in the past and still have some connection with the present. 我们用现在完成时来谈论在过去开始并且仍与现在有联系的事情。
At first glance, it looks as if there is no element of "present involvement" in this use of the Present Perfect, any more than in the Simple Past. 乍看起来,在现在完成时的用法中,似乎跟在一般过去时中一样,都没有“涉及现在”的因素。
She sent me the present by parcel post. 她用邮包把礼物寄给了我。