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