she had her hair cut

chuyen sang cau bi dong

she had someone cut her hair

=> Her hair was cut (by someone).

She had cut her hair by someone.

she had her hair cut (by someone)

She had been cut hair

chuyen sang cau bi dong 

1 she had someone cut  her hair 

she had .......her hair cut..................

2 who has rebuilt this wall  

by ..........whom has this wall been rebuilt?................

1. she had her hair cut

2. by whom has this wall been rebuilt

1 she had someone cut  her hair 

she had .......her hair cut..................

2 who has rebuilt this wall  

by ..........whom has this wall been rebuilt?................

X Change these sentences into passive voice

1 People should stop experiments on animals

Experiments on animals should be stopped.

2 We have to improve all the schools in the city

All schools in the city have to be improved.

3 They have just introduced a new style of jeans in the USA

A new style of jeans has just been introduced in the USA.

Experiments on animals should be stop (by people)

All schools in the city have to be improved.

A new style of jeans have just been introduced in the USA

Will they look after the little girl carefully? V3/V-ED

-->  Will the little girl be looked after carefully ?

Tim should send this postcard to Hoa.

--> This postcard should be sent to Hoa by Tim

People should stop experiments on animals.

--> Experiments on animals should be stopped

The teacher can explain the lesson until all the students understand it.

--> The lesson will be explained by the teacher until it is understood by all the students

You can’t do anything about it.

--> Nothing about it  can be done by you

13. You must do this work now.

--> This work must be done now by you

14. They have to finish the report today.

-->The report has to be finished today

Hoctot

a) We can solve the problem.
………The problem can be solved……………………………………………………
b) People should stop experiments on animals.
………Experiments on animals should be stopped……………………………………………………
c) We might find life on another planet.
…………Life on another planet might be found…………………………………………………
d) We have to improve all the schools in the city.
……All the schools in the city have to be improved………………………………………………………
e) They are going to build a new bridge in the area.
…………A new bridge is going to be built in the area…………………………………………………