2. 只有及物动词才有被动语态，不及物动词（词组）没有被动语态, 如:happen, take place,

die, appear, disappear, fail, remain, lie, last, sit ,stand, break out, come true, belong to等．如：

What has happened to your brother?

3．但许多不及物动词加介词或副词构成的短语动词，相当于及物动词，也可以有被动语态。

但短语动词是一个不可分割的整体，变为被动语态时，不可丢掉构成短语的介词或副词。如：

The child has been taken good care of by Grandma Wang all these years.

A notice has been put up on the wall

Step4: Practice and exercises

1.Change the following sentences into the Present Perfect Passive Voice.

!). We have completed all the preparations for the task, and we're ready to start.

2). This company has produced new types of computers.

3). They have interviewed several teachers for the job.

4). George has sent some texts and pictures to his friend's cellphone.

5). They have developed some programmes for the human resource department of their company.

2.Change the following sentences into the Present Perfect Passive Voice. Put the verbs into correct form.

Recently we have bought a new personal computer. We have used the computer every day since we bought it. We have just joined our computer to the Internet. However, we have found many problems