When do we use… Can? Could ? Must ? Mustn’t ? May? Might ? Should ? MODAL VERBS MEANINGS:
Here are some modal verbs examples: She could have eaten the cake, but she chose to eat a salad instead. I might have gone to the concert if I didn't have to work. Jan should have stamped the envelope before she mailed it. Henry would have made a great toast at the wedding, but he wasn't there.