I invited him to my party.(主动语态)
He was invited to my party.(被动语态)
1）主动语态中若宾语补足语是省略to的不定式，变为被动语态时，该不定式前要加"to"。即被动语态中无不定式省to的情况。此类动词为感官动词feel,hear,help,listen to,look at,make,observe,see,notice,watch
The teacher made me go out of the classroom.
-->I was made to go out of the classroom(by the teacher).
We saw him play football on the playground.
-->He was seen to play football on the playground.
Coal can be used to produce electricity for agriculture and industry.
The classroom must be cleaned every day.
My sister will be taken care of by Grandma.
Such a thing has never been heard of before.
It is said that…据说
It is reported that…据报道
It is believed that…大家相信
It is hoped that…大家希望
It is well known that…众所周知
It is thought that…大家认为
It is suggested that…据建议
It is taken granted that…被视为当然
It is said that she will leave forWuhan on Tuesday.
It’s taken granted that the children should take care of their old parents.
The book sells well.这本书销路好。
This knife cuts easily.这刀子很好用。
I was to blame for the accident.
Much work remains.
The door needs repairing.=The door needs to be repaired.
This room needs cleaning.这房间应该打扫一下。
This book is worth reading.这本书值得一读。
be determined,be pleased,be graduated(from),be finished,be prepared(for),be occupied(in),get married
He is graduated from a famous university.
注意：表示同某人结婚，用marry sb.或get married to sb.都可。
He married a rich girl.
He got married to a rich girl.
1）The teacher told us that the attraction of the earth for all bodies____ gravity.
A.is called B.called C.was called D.are called
2）The library needs___,but it'll have to wait until Sunday.
A.cleaning B.be cleaned C.clean D.being cleaned
解析：错选D。need表“需要”时，后面用动名词的主动形式表被动含义。答案选A。如有to be clean则也为正确答案。