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I have just read that modals never use do when forming a question.

I read it in a book where rules are couched in easy language.
My question is: how would a heavy-going advanced grammar book say: modals never use do in questions?

Second question:
I do not need to go there?
Do you need to go there?

According to modals never using do when forming a question, does it mean that 'need' is not a modal in "Do you need to go there?"?

Third question: is this sentence correct grammatically: According to modals never using do when forming a question, does it mean that 'need' is not a modal in "Do you need to go there?"?
Comments  
InchoateknowledgeI have just read that modals never use do when forming a question.

I read it in a book where rules are couched in easy language.
My question is: how would a heavy-going advanced grammar book say: modals never use do in questions?

IMO, The book is right to say modals never use do when forming a question.

Second question:
I do not need to go there?
Do you need to go there?

According to modals never using do when forming a question, does it mean that 'need' is not a modal in "Do you need to go there?"?

Yes, it does mean "need" is not a modal in " "Do you need to go there?".

Third question: is this sentence correct grammatically: According to modals never using do when forming a question, does it mean that 'need' is not a modal in "Do you need to go there?"?
I guess it's not quite right.To express exactly the same meaning, I think it should go this way:

(1) Is it right to take "need" as a none-modal verb in "Do you need to go there?" according to the rule of modals never using do when forming a question? [Using one sentence, not readable. But I guess it's grammatically right.]

(2) The book says modals never using do when forming a question. Does it suggest that 'need' is not a modal in "Do you need to go there?"? [Two sentences, more readable]

Thanks
Students: We have free audio pronunciation exercises.
In the case of modals like can, may, should, etc., the word itself is a modal verb. That is, these words have no non-modal uses.

need is different. We can't say "It's a modal." We can't say, "It's not a modal".
It has a modal use and a non-modal use.

I don't need to tell you this. (need in its non-modal use, i.e., need in its use as a full verb)
I needn't tell you this. (need in its modal use)

CJ
Now I see the light.
The same is the case with 'dare', is it not?
Yes, indeed. An astute observation!
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Thank you for your correction. Emotion: smileEmotion: smile