How long have you been waiting? / Should we buy her a present? - We make questions with tenses where there is an auxiliary verb (be. have, etc.) and with modal verbs (should, must, etc.) by inverting the subject and the auxiliary / modal verb. With the present and past simple, we add the auxiliary verb do / does or did before the subject., Why didn't you like the film? / Isn't this a beautiful place? - We often use negative questions to show surprise when we expect somebody to agree with us, or to check whether something is true., What are they talking about? / Who does this bag belong to? - If a verb is normally followed by a preposition, e.g. talk about sth, the preposition comes at the end of the question, not at the beginning. , A: I'm thinking B: What about? - We often use the question word and the preposition., Who lives in that house? / How many people follow you on Twitter? - When who/ what / which, etc. is the subject of questions in the present or past simple, we don't use do / did ,

UI1: Question formation

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