4道同义句转换（主动→被动）
问题描述：
4道同义句转换（主动→被动）
1.I must see my old teacher tomorrow
2.The policeman can't have found my lost car
3.The student has to read this lesson tonight
4.My mother sent me a new pen yesterday
答
My old teacher must be seen by me tomorrow
My lost car can't have been found by the policeman
This lesson has to be read by the student tonight
A new pen was sent me by my mother yesterday