It was a waste of time worrying, after all! You ....
You needn't have worried after all!
I think it was the cat that took the fish from the table! The cat .....
The cat must have taken the fish from the table.
Jack is supposed to have arrived half an hour ago. Jack ...
Jack should have arrived half an hour ago.
I'm sure they haven't eaten all the food. It's not possible! They ....
They can't have eaten all the food.
It started raining heavily so it wasn't necessary for me to water the flowers/ It started raining heavily so I...
It started raining heavily so I didn’t need to water the flowers
I didn't go to bed early and now I'm tired/ I...
I should have gone to bed early
