Using Perfect Infinitives with Modal Verbs

Yesterday my car broke down and I ... to take a taxi

Alex ... swim when she was three.

Rewrite the following sentences using the modal perfect

 It was unnecessary for you to do this task. You needn't have done the task.

Rewrite the following sentences using the modal perfect

It was a bad idea to go to the city centre.

Rewrite the following sentences using the modal perfect

 It’s possible that I left my mobile phone at home because I can't find it anywhere here.

You ... have bought that dress , because in the Internet it costs less

You ............... give them money as a present – it’s not polite! 

(припущення)

They ................... stay here.

Rewrite the following sentences using the modal perfect

I’m sure Kirill took your stapler by mistake.

Наші сусіди могли почути деякі звуки, коли вкрали вашу машину.

The children were to have spent the summer holidays in the Carpathians.

Діти відвідали Карпати?

John shouldn`t have said this in Mary`s presence.

Джон образив Мері ?