高一句型转换..速度

1.不要改，这句话没有强调当时正在，故用过去完成时，要看语感。
2.we have made computers smaller and smaller,as years have gone by.
3.
it was reported by them that refugees will be offered financial aid.
4.what the teacher and students require was considered by us.

1.a lot of e-mail on the computer have been written by us in the past few years

1. A lot of e-mail on the computer has been written (by us) in the past few years.

改为被动语态时，have written要改成has been written. 否则怎么体现被动的含义了？
当然还要要把have变成has，因为主语被视为是不可数名词。

2.As years have gone by, we have made computers smaller and smaller.
主语用we最好，用其他的不太合适。

3.They have reported refugees will be offered financial aid.
=It (has been reported that) refugees will be offered financial aid.

4.We have considered what the teachers and students require.
=What the teacher and students require (has been considered by us).