Matching Pairs B1+ - U5 - GrammarOnline version Match the sentences with the functions of the modals. by Rocío Oviedo 1 You NEEDN'T HAVE worried about giving the presentation. You were really good! 2 I SHOULD HAVE asked about the tickets. I think it's too late now. 3 They COULD HAVE joined us in Vietnam, but they decided to stay longer in Laos. 4 I couldn't find my keys and I thought I MIGHT HAVE lost them in the park. 5 He MUST HAVE done really well in the interview for them to offer him the job so quickly. past possibility criticism of past actions past possibility lack of necessity or obligation in the past certainty about the past