David: She must have forgotten about our date. Past Conditional In French . The past conditional is a compound tense, and follows the exact same agreement rules as passé composé. Could have is often used with “if + had + past participle” (If I had gone / if she hadn’t fallen) – these “if” phrases express the imaginary past situation. O lo podría haber puesto en la caja equivocada y prestado a ustedes por accidente. However, in some cases you can use could have without the “if” phrase. If she hadn’t been so bad-tempered, I might have married her. We use may have, could have, might have to say that it was possible that something happened in the past (but we are not 100% sure). Andy:I don't like Walmart. MIGHT HAVE; Might expresses an opinion: an uncertain guess, a speculation, based on very little information. This is called the modal perfect tense. Yeah, i might have extra. teacherdehnavi Senior Member. 'may not' would mean the same as 'might have'. Imagine you’re driving with a person who makes a dangerous maneuver on the road. Will: “You might’ve been able to get better seats if you got there earlier.” Been is the past participle of the verb to be. Persian Aug 21, 2018 #14 to have + present perfect I have … This is called the modal perfect tense. All the best, Kirk May have Past unreal possibility We may have passed the math exam, but it was in Spanish. Could have Past unreal ability He could have taken the flight. If you had gone to Hollister,they would have given you a discount. May / might / could have: expressing past probability: Structure: modal + have + past participle may have been, could have gone, might have lost, etc. He was supposed to be here an hour ago but he could have been stuck in a traffic jam. He may have said he was coming but I can’t really remember. All the items are expensive. The road might have been blocked. 'could have' can also be used to make guesses about the past, and thus could also be used here, but most of the time we use 'might have' or 'may have' to do this. She might have worked late. ... Summary: Following clause must be in past tense if main clause is in the past participle to be considered well formed. Past modal verbs are must, could, might and may with have + past participle to talk about suppositions or speculations regarding a past event. B. i might have put it in the wrong case and lent it to you by accident. Might have/may have/could have + past participle We use ‘might have/may have/could have + past participle’ when we are not sure about something but we think it was possible. Would have + past participle:It is usually depending on the result. John:I bought my hat at Walmart. Vincent: “Everyone’s here except Brad.” Ian: “He might’ve had to work late tonight. In English, the past conditional could also be “could have”, “should have”, “might have”. Might have expresses an opinion about an earlier (past) situation.. A GUESS: The car driver might have tried to pass between two buses.. One of the bus drivers might have changed lanes without looking first.. She could have taken the wrong bus. : He may have missed the bus. He said work has been busy this week.” Had is the past participle of the verb to have Modals in Past, Modal + Have + Participle Modal + have + participle Modal Concept Example Would have Past unreal action If I had guessed the future, I would have taken some precautions againist what would happen. The negative forms are : Shouldn't have/Couldn't have/Wouldn't have. The bus drivers might not have been able to see the smaller, lower car. might / might not have + past participle; could / couldn't have + past participle; may / may not have + past participle; can't have + past participle; For example: You: Where was Julie last night? Yes, 'could not have' would express impossibility here. 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