Multi-word verb
From Infogalactic: the planetary knowledge core
Multi-word verbs are verbs that consist of more than one word,[1] e.g. had better, used to, be going to, ought to. Although they can be synonymous with phrasal verbs, in the strict sense there is a distinction between the two, where multi-word verbs is a term that covers both phrasal verbs (verbs + adverbs) and prepositional verbs (verbs + prepositions).[2] They are used as modals, but they are semi-modal rather than modal verbs. This is an example of periphrasis.
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