Sentence transformation. I regret not going to bed earlier last night. SHOULD I ... to bed earlier last night.

The local government ... a new shopping centre there - it was a site of historical importance.

Correct. Their train should arrived by now.

Correct. I should listened to my teacher this morning. I don't understand any of this.

Mary didn't join us at the shopping centre because she ... a present for the party - she's already bought something online.

Correct. I needn't have filled my car with petrol because it was already full.

Correct. He didn't need to use his phone while driving. It's against the law.

Correct. He shouldn't have ate all those sweets.

What you should have done was to have talked to the manager immediately. / You didn't talk to the manager immediately but that would have been the right thing to do.

You didn't really need to wear a suit to that event but you looked good. / The event required men to wear suits and you looked good in the one you wore.

Correct.  didn't need to have brought my jumper with me. It's boiling.

You shouldn't have bought those jeans without trying them on. / It's good that you tried on those jeans before you bought them.

Sentence transformation. I regret shouting at him this mornig. HAVE I ... at him this morning.