Hi from Türkiye,
Modals : Can, Could, May, Might, Should, Ought to, Must, Would, Will, Shall
Semi-modals : Dare, Need, Have to, Used to
Others : Had Better, be Supposed to, be Used to, be Accustomed to etc.
Why we call semi-modals and others instead of saying all of them modal??????(It was taken from a grammar book)
Modals : Can, Could, May, Might, Should, Ought to, Must, Would, Will, Shall
Semi-modals : Dare, Need, Have to, Used to
Others : Had Better, be Supposed to, be Used to, be Accustomed to etc.
Why we call semi-modals and others instead of saying all of them modal??????(It was taken from a grammar book)
Hi redliddy
I am not so sure what to say about your 'Others' group but the difference between 'Modals' and 'Semi-modals' is very clear. I have always called 'modals' defective auxiliaries, by the way, but I do know that your term is also used.
With the modals you never use do in questions and negations:
I can't swim. (Not: I don't can swim.)
Should I go there? (Not: Do I should go here?)
With the semi-modals you have a choice, at least many grammarians think so:
Dare he do it? Or: Does he dare to do it?
I need not go there. Or: I don't need to go there.
He used to like it. Or: He didn't use to like it. (Quite a few people consider even He didn't used to like it correct.)
However, most usage experts (if there are any
) would want you to sayI don't have to do it, and would think I haven't to do it wrong.
But even have can be made negative without do when it is the auxiliary of the perfect tense: I haven't seen him. So that may be the reason some people call it a semi-modal. And you can say:
I haven't a cat. Or: I don't have a cat.
Cheers
CB
I am not so sure what to say about your 'Others' group but the difference between 'Modals' and 'Semi-modals' is very clear. I have always called 'modals' defective auxiliaries, by the way, but I do know that your term is also used.
With the modals you never use do in questions and negations:
I can't swim. (Not: I don't can swim.)
Should I go there? (Not: Do I should go here?)
With the semi-modals you have a choice, at least many grammarians think so:
Dare he do it? Or: Does he dare to do it?
I need not go there. Or: I don't need to go there.
He used to like it. Or: He didn't use to like it. (Quite a few people consider even He didn't used to like it correct.)
However, most usage experts (if there are any

But even have can be made negative without do when it is the auxiliary of the perfect tense: I haven't seen him. So that may be the reason some people call it a semi-modal. And you can say:
I haven't a cat. Or: I don't have a cat.
Cheers
CB
Comments
others = modal idioms
"Why we call semi-modals and others instead of saying all of them modal"
because they are intermediate between auxiliaries and main verbs.
I daren't jump -- You mustn't jump
I do not dare jump --
You do not must jump