解析:选B 句意:煤能够被用来为农业和工业发电。由句意可知此处为含有情态动词的被动语态,故B项符合题意。
2.使役动词和感官动词的被动语态
(1)在使役动词have, make, get以及感官动词see, watch, notice, hear, feel, observe等后面不定式作宾语补足语时,在主动结构中不定式 to 要省略,但变为被动结构时,要加上to。 get, leave, cause 等使役动词的宾语补足语是带 to 的不定式,变为被动语态时该不定式不变。
My father made me stay up late to finish my homework.(表示主动)
I was made to stay up late to finish my homework by my father. (表示被动)
[即时演练3]
(1)句型转换(每空一词)
①I didn't notice her enter the office.
→She wasn't noticed to enter the office.
②Someone saw a stranger walk into the building.
→A stranger was_seen to walk_ into the building.
(2)Last December, 14 bears were seen ________ from the bile (胆汁) trade in Vietnam.
A.rescued B.to rescue
C.rescuing D.rescue
解析:选A "see sb./sth. do/doing/done"为常用结构,这一结构的被动语态为"be seen to do/doing/done"。分析题干可知,空格处与句子的主语之间为动宾关系,所以应用过去分词"rescued"。故选A。
(2)有些动词可以有两个宾语,在用于被动结构时,可以把主动结构中的一个宾语变为主语,另一宾语仍然保留在谓语后面。通常变为主语的是间接宾语。
His mother gave him a present for his birthday.
→He was given a present by his mother for his birthday.
他妈妈送给他一份生日礼物。
3.短语动词的被动语态
短语动词是一个整体,不可丢掉它后面搭配的介词或副词。
It is said that a new railway station will be set up in my hometown.
据说一个新的火车站将在我的家乡建起来。
The baby is being taken care of by his grandmother.
这个婴儿正由他祖母照顾。
Such a strange story has never been heard of.
这样奇怪的事情还从没有听说过。