将下列主动句改为被动句They clean their classroom after school.Li Lei ga

They clean their classroom after school.
Their classroom is cleaned by them after school.
Li Lei gave Tom a new pen last week.
A new pen was given to Tom by Li Lei last week.
A lot of people in China can speak English now.
English can be spoken by a lot of people in China now.
I have learned English for about two years.
English has been learned by me for about two years
They will write these story-books next month.
These story-books wil be writen by them next month.

1 Their classroom are cleaned by them after school.
2 Tom was given by a new pen by Li Lei last week.
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A new pen was given to Tom by Li Lei last week.
3 English can be spoken by a lot...