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must have returned should return must return should have returned
must needn’t mustn’t need
must have returned could return should have returned might return
needn't; must mustn’t; can mustn’t; may needn't; need
keep borrowed have kept have lent
needn’t; can mustn’t; must mustn’t; may needn’t; must
keep borrowed have kept have lent
keep borrowed have kept have lent
needn’t, must mustn’,t can mustn’t, may can’t, need
should return may have returned should have returned must return
needn’t, must mustn’t, can mustn’t, may needn’t, need
Must; mustn’t Could; can’t Must; needn’t Could; couldn’t
must have returned could return should have returned might return
to take; mustn’t take; needn’t to bring; needn’t bring; mustn’t
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