Phrases with Multiple Auxiliary Verbs?

Question

What are the common phrases with multiple auxiliary verbs which are used to make sentences?? Eg: 1. "have to do" - "You have to see a doctor" 2. "should have done" - "you should have attended the class" 3. "could have done" - "I could have gone to the movies, if I had cleaned the house" I need a list of common phrases like this. Because learning this kind of phrases and its usage can really help English learners. It will be quote useful in the daily life. I request all of you to please share the phrases you know. Thanks

Answer 1

"might have" - I might have gone shopping yesterday but decided against it; "would have" - "I would have gone to work yesterday but I was too sick." Also think of the negative versions of all of these, e.g. "shouldn't have" - I shouldn't have told him our secret and now I regret it.