④In the last few years，China has made (make) great achievements in environmental protection.

　　⑤His first novel has received (receive) good reviews since it came out last month.

　　2．现在完成时的常用句型

　　(1)It/This is the first/second/...time that＋主语＋谓语部分(常用现在完成时)

　　(2)It has been＋一段时间＋since...

　　(3)It/This/That is the＋最高级＋名词＋定语从句(定语从句常用现在完成时)

　　It is the first time that I've heard of the story about Crop Circles.

　　这是我第一次听说麦田怪圈的故事。

　　This is the best film(that)I've ever seen.

　　这是我所看过的最好的一部电影。

　　3．在时间或条件状语从句中，现在完成时可以代替将来完成时

　　If you have done the experiment，you will realize the theory better.

　　如果你做过这个实验，你会更好地理解这个理论的。

　　4．现在完成时和一般过去时的区别

时态 区别 例句 现在完成时 重在强调过去的动作或状态对现在的影响，重点在现在。 I have lost my new book.

我把新书弄丢了。(现在还未找到) 一般过去时 重在强调某个过去的动作或状态，与现在并无联系。 I lost my new book yesterday.

我昨天把新书弄丢了。(昨天丢的，现在找到与否没有说明) 　　[即时演练2]　用所给动词的适当形式填空

　　①clean

　　We cleaned the classroom just now.

　　We have already cleaned the classroom.

　　②work

　　I worked in the factory for 3 years，now I run a restaurant.

　　I have worked in the factory for 3 years.

③-Kevin，you look worried.Anything wrong?