Question

一道英语选择题！

-do you often hear tom_in the next room?
-no,but he is often heard_the guitar in the garden outside.

a.sing,to play b.to sing,play c.sing,play

求解释！

Answer 1

A

追问

为什么？

追答

hear sb do sth听到某人做某事
当该为被动时要变为be heard to do
像这样的词还有很多：make help等

Answer 2

hear,see,watch,let ,make ,listen to ,notice ,observe ,feel ,等使役动词和感官动词在主动语态中，省略不定式的to ,但在被动语态中再加上to.

所以选择A.

Answer 3

A
hear sb. do sth./hear sb.doing sth.
被动时,sb.be heard to do sth.

Answer 4

答案选A。
第一空 考查的是 hear sb do sth（hear 的宾补是省略to 的不定式） ，第二空 考查当hear用于被动语态时（他被别人听到在外面花园弹吉他），不定式一定要带to，应转换为 be heard to do sth（这里的不定式做主补）。

Answer 5

答案是A。hear sb do ,be heard to do

Answer 6

选A。hear sb do sth 听见某人做某事的全过程，hear sb doing sth 听见某人正在做某事。当这种结构变成被动，需要加上to。