.1.She were often heard ____ this song when she was happy.1.She were often heard ____ this song when she was happy.a.sang b.singing c.sung d.to be singing
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.1.She were often heard ____ this song when she was happy.1.She were often heard ____ this song when she was happy.a.sang b.singing c.sung d.to be singing
.1.She were often heard ____ this song when she was happy.
1.She were often heard ____ this song when she was happy.
a.sang b.singing c.sung d.to be singing
.1.She were often heard ____ this song when she was happy.1.She were often heard ____ this song when she was happy.a.sang b.singing c.sung d.to be singing
B
hear sb.do 听见某人做某事(这个do是不带to的动词不定式),在变为被动语态时,to不得省略
另外,还有hear sb.doing (这个doing是现在分词),表示听见某人正在做某事
题目是被动语态,要么变为be heard to sing,要么是be heard doing,没有前者,只有后者,选B
d. to be singing
你好,选B
当她高兴的时候,人们经常听到她唱这首歌。
希望我的回答对你有帮助,祝好。
hear sb. doing sth. 改成被动就是 sb. be heard to be doing sth.
所以选择D
B 当她不开心的时候,经常可以听到她哼唱这首歌。