4.Most of the artists______to the party were from South Africa.　 (NMET)

　　 A.invited　　 B.to invite　　 C.being invited　　 D.had been invited

析：首先可排除B。因为它不表示“被邀请”。又因D项少引导词who，也应排除。A项＝who were invited,C项＝who were being invited,由象invite这类短暂动词的现在分词被动式不可作后置定语，故也应排除。因而可定答案为A。

3．Great changes______in the city,and a lot of factories______.　 (NMET)

　　 A.have been taken place…have been set up

　　 B.have taken place…have been set up

　　 C.have taken place…have set up

　　 D.were taken place…were set up

析：take place(发生)是不及物动词，不可用于被动语态，于是可排除A、D，又因set up(建造)是及物动词，在此题中应该用被动式，故排除C，答案为B。

2.--Do you like the material?

　　 --Yes,it______very soft.　 (NMET)

　　 A.is feeling　　 B.felt　　 C.feels　　 D.is felt

析：观察题干，空白线后无宾语，可知feel是不及物动词，表“(某物)摸起来…”意思,是连系动词，不能用于被动式，也不用进行时。根据此题对话情景，是指某种材料的常规特性，要用一般现在时，不能用过去时，故答案为C。feel作“感觉”、“认为”、“摸”等意时是及物动词，可带宾语，有时态，语态等变化。

1.I need one more stamp before my collection______.　 (NMET)

　　 A.has completed　　pletes　　 C.has been completed　　 D.is completed

析：complete是及物动词，“邮集”是被人完成的，须从表被动意的C、D中选择。又因before等引导的时间状语从句中谓语要用一般现在时表将来，所以此题答案为D。

4.She took part in the sports meet.不能变为The sports meet was taken part in by her.因为象take part in,belong to ,own,have,hate,fail,contain等表状态动词没有被动语态。

被动语态考点分析

3.He lost heart.不可变为Heart was lost by him.因为象lose heart,make a face,keep silence,lose in thought这类动宾结构的固定短语只能用于主动式，不能用被动式。

2.We help each other/one another.不可变为Each other/One another is helped by us.因为相互代词不可作主语。

1.I teach myself French.不可变为Myself is taught French.因为反身代词不可作主语。

3.不定式在某些形容词之后，且与主语有动宾关系。常见形容词有：hard,defficult,easy,heavy,fit,good,comfortable,convenient,impossible等。例如：The problem is easy to do./The question is difficult to answer./The box is heavy to carry./The project is impossible to complete in a year.比较：The problem is to be done./The question is to be answered.没有形容词时，虽然不定式与主语是动宾关系，但必须用被动式。

2.一些连系动词的主动式+形容词。常见动look,smell,taste,sound,feel,prove,turn out等。例如：The apples taste good./The flower smells wonderful./The news proved/turned out true./Cotton feels soft.注：prove也可用于被动式，如：His answer(was) proved right.