Поставить в passive voice: 1)they deliver the post twice a day the 2)you never use your computer youe 3) i am not going to the party. they have not invited me. i am not going to the party. 4)they are examining the students in this class the

1) They deliver the post twice a day
The post is delivered (by them) twice a day
2) You never use your computer
Your computer is never used (by you).
3) I am not going to the party. They have not invited me.
 I am not going to the party. I haven't been invited (by them)
4) They are examining the students in this class
The students are being examined (by them) in the class.