.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
问题描述：
.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
答
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。
答
hear sb. doing sth. 改成被动就是 sb. be heard to be doing sth.
所以选择D
答
B 当她不开心的时候，经常可以听到她哼唱这首歌。
答
d. to be singing
答
Bhear 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b...