1) Ann was out so she ________ drunk the milk. a) couldn't have b) must have c) shouldn't have 2) I ________ watched that movie before; I can't recall it right now. a) may have b) couldn't have c) should have 3) I tried to call her many times but she didn't pick up the phone, so she ________ gone out this morning. a) couldn't have b) must have c) should have 4) He ________ seen a doctor before. If he had done that, he wouldn't be feeling so under the weather. a) must have b) should have c) could have 5) Sharon: "have you seen my keys?"; Mike: "I'm not quite sure, but I ________ seen them on the table earlier" a) may have b) couldn't have c) must have 6) I can't remember much from last night... I was so wasted I ________ even ________ hit on your sister... a) couldn't have b) must have c) may have 7) You seem worried about your parents. You ________ called them before they travelled. a) should have b) must have c) could have 8) John is a terrific student, but last semester his grades were terrible. He ________ had some kind of family problem. a) couldn't have b) should have c) must have 9) Linda: "have you met Ann recently?"; Susan: "I ________ met her even if I wanted to, I've been so busy..." a) must have b) might have c) couldn't have 10) You ________ left your cell phone on the table this morning, I believe I've seen it on the table. a) might have b) couldn't have c) must have

Modals in the Past

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