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musthave toIt should be noted that the expression be allowed to is synonymous with may only whenmay is used in the sense of permission being granted.The following examples illustrate how synonymous expressions may be used when it isdesired to put the modal auxiliaries can, may and must into the future.PresentI can work.You may work.He must work.FutureI will be able to work.You will be allowed to work.He will have to work.See Exercise 11.a. The pronunciation of Have ToThe following table illustrates how the pronunciation of the words have and has in theexpression have to differs from the usual pronunciation of the verb to have. In theexpression have to, the consonant preceding the t of to is unvoiced. An imitatedpronunciation of has and have is indicated in the right· hand column.Usual pronunciation of HaveExampleShe has two children.We have two children.Imitated Pronunciation··haz"···hav··Pronunciation of Have in the expression Have ToExampleShe has to leave.We have to leave.Imitated Pronunciation··hass····haW7. The use of auxiliaries in tag questions, short answers and ellipsisIn English, the verbs used as auxiliaries are to be, to do, to have, and the modalauxiliaries. All of these auxiliaries can be used in tag questions and short answers.a. Negative tag questionsNegative tag questions have already been discussed. An affirmative statement is oftenfollowed by a negative tag question, in order to ask for confirmation of the affirmativestatement. In the following examples, the negative tag questions are underlined.Contractions are usually used in negative tag questions.e.g. You are coming with me, aren"t you?You like coffee, don"t yo u?