Question

change the sentences to the present perfect passive
1:A problem on the line has delayed the train.
2:We've postponed the concert till next week.
3:They have cancelled the match.
4: They've eaten all the food.​

Answer 1

they have cancelled the match

Answer 2

Answer:

A train has been delayed by a problem on the line.

The concert has been postponed by us till next week.

The match has been cancelled by them.

All the food have been eaten by them