Your sister is often heard____(sing) English songs in the af

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Your sister is often heard____(sing) English songs in the afternoon.
One of the cleaners _____(remove) the snow from 5 to 7 yesterday morning.
The boy is very happy because all the newspapers____(sell)out already.
There _____(be)two football matches in your school tomorrow ,are there?
How many magazines can ___(borrow) in your library every week?
John_____(hear)to go upstairs two hours ago.
Who ____(save) her father?He ____(save)by that policeman.
Mooncakes ____(make)by his mother every year.
The boy ____(make)____(stay)at home.
The computers in that shop _____(sell)well.
They should ____(help) when they are sick.

Your sister is often heard_to sing___(sing) English songs in the afternoon.
hear sb.do 变被动,要加to
One of the cleaners _was removing____(remove) the snow from 5 to 7 yesterday morning.
昨天5点到7点是过去进行的时间状语
The boy is very happy because all the newspapers_have beensold___(sell)out already.
aleady已经,是现在完成的时间状语
There _are going to be____(be)two football matches in your school tomorrow ,are there?
将来时,而且后面反义疑问句用are,所以前面用be going to
How many magazines can _be borrowed__(borrow) in your library every week?
情态动词的被动语态
John_was heard____(hear)to go upstairs two hours ago.被动语态
Who _saved__(save) her father?He _was saved___(save)by that policeman.过去时被动语态
Mooncakes _are made___(make)by his mother every year.一般现在时的被动语态
The boy _is made___(make)_to stay___(stay)at home.一般现在时的被动语态
The computers in that shop __sell___(sell)well.sell与well连用,用主动语态表示i被动意义
They should _be helped___(help) when they are sick.情态动词的被动语态
不明白,

Your sister is often heard____(sing) English songs in the af we often hear her _______(sing) English songs in the next ro 练习6.My cousin is often heard___________ (sing) English songs the teacher often< >（sing） english songs for her students ! I often h____ the girl next door sing English songs. I often hear him sing English songs We have fun___（sing)English songs in the music class. I often hear Mary sing English songs at home.(被动）Mary is oft She often sings English songs in the evenings. 用适当形式填空he often (sing )english songs at the party Her sister can sing English songs.改为疑问句是什么? her sister can sing english songs.改为疑问句