These advantages incorporate tax cuts, legitimate advantages, and credit benefits. Fusing your business can furnish you with such a large number of advantages that you won't have the option to profit by in the event that you enable your business to stay all things considered. I don’t have a specific source which quotes this example exactly, but, for example “Practical English Usage” by Michael Swan, a respected grammar reference, states the rule I have explained above.At the point when you are prepared to step into building your business, you should step into fuse. BUT – you certainly shouldn’t have been penalised for using “don’t they” as this is perfectly correct. Using “haven’t they” in your example is an example of this. That’s how the language evolves, as different ways of saying things become common and accepted and therefore a part of the language. Now, in spoken English we hear many instances where these “rules” are broken, and that’s because English grammar rules are not set in stone. So, in your example, there is no auxiliary verb in the main clause – “has” is the main verb here. In the absence of an auxiliary verb in the main clause, we use “do” in the tag (or does, or did). The usage of “don’t they” in this example follows the rule for all question tags: We take the auxiliary verb from the main clause and use it in the tag. This is good because it gets their minds used to responding quickly and directly in English and avoids over-thinking structures and translating from their native language. They get a little stressed out because when their turn comes, they tend to panic trying to think of the right tag. Students realize their mistakes through their classmates’ answers. You should get the right tag before moving on.This exercise is fast and there are no explanations on why the answers they come up with are right or wrong. If they are wrong, you go to the next student for the right tag. The student has only one chance to answer. You read out one of your sentences in the list and assign one of your students to come up with the proper tag. Make a list of sentences covering most structures and tenses (affirmative and negative in random order).
The main pupose is to speed up students’ minds and enabe them to use the structure as fast as they can. This is an exercise to test students’ ability to come up with quick answers, and it’s very simple.
With used to, we use “didn’t” in the tag.If the main verb in the sentence is have (not an auxiliary verb), it is more common to use do in the tag.If the subject is nobody, somebody, everybody, no one, someone or everyone, we use “they” in the tag.
When the subject is nothing, we use “it” in the tag.We use an affirmative tag after a sentence containing a negative word such as never, hardly, nobody.With an imperative, the tag is will you?.In the present form of be: In an affirmative statement, if the subject is “I”, the auxiliary changes to aren’t in the tag.The meeting’s tomorrow at 9am, isn’t it?.We use tag questions to check whether something is true.You don’t know where the boss is, do you?.We use tag questions to confirm or check information or ask for agreement.If the auxiliary verb in the sentence is negative, the tag is affirmative.If the auxiliary verb in the sentence is affirmative, the tag is negative.If there is no auxiliary verb in the main sentence, we use do in the tag. We use the same auxiliary verb in the tag as in the main sentence.