Diane was supposed to write to her parents last week ought

1.Diane was supposed to write to her parents last week OUGHT
=> Diane ......................
2.I'm afraid there may be something missing from your report OVERLOOKED
=>...................................
3.You couldn't have seen Mary in the park
=>It.................................
4.He must have spent a small fortune renovating the old house
=>
Giúp mình ạ !!!