1、we help an old man cross the street
2、we helped an old man cross the street
3、Danny sees Jenny come out of the classroom
4、Danny saw Jenny come out of the classroom
5、I ofen send Danny an e-mail
6、I sent Danny an e-mail yesterday
有两种变法的都写出来
1、an old man is helped cross the street by us.
2、an old man was helped cross the street by us.
3、jenny is seen by danny to come out of the classsroom.
4、jenny was seen by danny to come out of the classsroom.
5、the e-mail is often send to danny by me.
6、an e-mail was sent to danny by me yestaday.
2、an old man was helped cross the street by us.
3、jenny is seen by danny to come out of the classsroom.
4、jenny was seen by danny to come out of the classsroom.
5、the e-mail is often send to danny by me.
6、an e-mail was sent to danny by me yestaday.
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