Unit 2. Mystakes and MysteriesOnline version Solve the following questions to practice modal verbs in the past. by MARIA FERNANDA RETANA BETANCOURT 1 Which sentence is NOT grammatically correct? a I may have left the form at home. b He can’t have got lost! c Joseph must have forget about the party. 2 I didn't know you needed help. You ________ me a should tell b should have told c had to tell 3 I am sure he was here. I saw his car in front of the building. He ________ been here a should have b might have c must have 4 If you wanted to stay in that hotel you __ booked before! a could have b should have c might have 5 Oh no! My phone isn't in my bag. I __ left it on the train. a might have b must have c should have 6 We couldn't find a hotel so we _________ in the car. It was so uncomfortable! a had to sleep b should have slept c must have slept 7 He ________ the bus because his brother picked him up at the station. a shouldn't have taken b didn't need to take c had to 8 The effects _______ last 6 to 8 hours. Sadly, I felt bad after 5 hours. a needed to b had to c were supposed to 9 Tom ______ to call Susan yesterday but he forgot. a was supposed b were supposed c needed to 10 When I was a child, children under five years old ______ swim without an adult. a didn't have to b weren't supposed to c shouldn't have to Explicación 1 must have + past participle verb, the past participle of forget is forgotten 2 should have is used for advices in the past 3 must have is used when we are 100% sure about something 4 You should have booked = It was a good idea to book (but you didn't). 5 Might have left it = it's possible that I left it on the train. 6 We need to express past obligation, and had to is the only form we have in this sentence to do it. 7 When something was NOT necessary and we did NOT do it, we use didn’t need to 8 were supposed to = it didn't happened 9 was supposed= a situation that did not happen. Was is the verb 'to be' for the third person singular. 10 didn't have to= prohibition in the past
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