Unit3 Sports and Fitness Discovering Useful Structures 课件-2023-2024学年高中英语人教版（2019）必修第一册

Tag questions tag  a small piece of paper, plastic etc attached to something to show what it is, who owns it, what it costs etc. name/identity/price tag What is a tag question? A tag question is a special construction in English. It is a statement followed by a mini-question. We use tag questions to ask for confirmation. They mean something like: "Is that right?" or "Do you agree?" They are very common in English. The basic structure of a tag question is: positive statement negative tag Snow is white, isn't it? negative statement positive tag You don't like me, do you? Notice that the tag repeats the auxiliary verb (or main verb when be) from the statement and changes it to negative or positive. Positive Statement Tag Questions Look at these examples with positive statements. You will see that most of the time, the auxiliary verb from the positive statement is repeated in the tag and changed to negative. (+) positive statement (-)negative tag subject auxiliary main verb auxiliary not personal pronoun same as subject You are coming , are n’t you? We have finished , have n’t we? You do like coffee, do n’t you? You like coffee, do n’t you? They will help , wo n’t they? subject auxiliary main verb auxiliary not personal pronoun same as subject I can come , can n’t I? We must go , must n’t we? He should try harder, should n’t he? You are English, are n’t you? John was there, was n’t he? Notice: the use of do in the two coffee questions. Remember that in Present Simple, do is optional in positive statements (You like coffee/You do like coffee). But the do must appear in the tag. The same applies to Past Simple did. in last two questions, no auxiliary for main verb be in Present Simple and Past Simple. The tag repeats the main verb. Negative Statement Tag Questions Look at these examples with negative statements. Notice that the negative verb in the original statement is changed to positive in the tag. (-) negative statement (+) positive t