Somewhen somewhere I met 'It may possibly rain today'. What is the sense to mention possibilty twice?
I follow Quirk et al, and others, in considering that there are two types of auxiliary (or 'helping', if you like) verbs: The primary auxiliary verbs, BE,HAVE, DO, and the modal auxiliary verbs (or just 'modals'), can, could, may, etc.edit: Although I have not heard may described as a "helping verb" this certainly does not mean that it isn't one. I've always considered may as a modal verb (according to the Oxford Dictionary).
NOT A TEACHER
(1) Great question. It seems to make the statement more emphatic, don't you think?
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