6. When ‘need’ is used before a main verb, it forms the tag: He needs to see you, needn’t he?
7. When ‘need’ is preceded by an auxiliary verb, the auxiliary verb forms the tag: He can also need me someday, can’t he?
8. When ‘must’ and ‘ought to’ are used in sentences, need can form the tag: He ought to see his supervisor, needn’t he?
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