General goal: Students master the basic structure and the usage of Present Perfect Passive Voice.
Questions:Compare the following sentences and find out the similarities and differences.
Group A 1). I have finished my homework.
2). Mary has locked the door.
3). She has told me about the story.
Group B 1). My homework has been finished.
2). The door has been locked.
3). This book has been read many times .
【探究发现】
1. A组句子强调动作的_________, 是________语态, 结构是 _________,
B组的句子强调动作的________, 是_______语态, 结构是_________,
A和B组中的相同点是_____________________。
2. 英语有_____语态和______语态。原来的宾语变成主语，句子就变成了______语态。现在完成时被动语态的构成_______________。
【温故知新】
1.Your computer has been repaired.
2.Your computer has not been repaired.
3.Has your computer been repaired?
--Yes, it has.
4.How long has the computer been repaired?
【句法分析】 现在完成时被动语态有以下几种结构：
1)肯定式：______________________________
2)否定式：______________________________
3)一般疑问式：__________________________
4)特殊疑问式：__________________________
【用法探究1】
1.The problem has already been solved.
