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