Speculating about the Past and Regrets (Modal Perfects)

Hi, here you are more online practice on the Modal Perfects to speculate about the past:

Exercise 1 (multiple choice overview)

Exercise 2 (gap-filling overview)

Exercise 3 (another gap-filling drill)

Exercise 4  (do you know when to use the modal + infinitive OR the modal + have + participle? Check it out there! Remember: is the sentence set in the present or in the past?)

Finally, here you are an exercise (with keys) of should (have+part.) to express regret.

Do them as many times as possible to nail them!