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Can ; can ; must Must ; need ; can May ; must ; must May ; need ; must
was a had young man used to cause much trouble when he was a boy got into trouble with the police used to be afraid of the dark.
getting; at making; in asking; on putting; in
Ever since In case Even though Now that
heard to sing, may was heard sing, must heard sing, must was heard to sing, may
Must, can Can, can Must must have Can, must have
Must;can Can;can Must;must have Can;must have
nearly completely merely identically
worry; can worrying; must worried; must worried; should
Must;can Can;can Must;must have Can;must have
must not can’t may not should not
Must, can Can, can Must must have Can, must have
must have been would have been would be must be
heard to sing, may was heard sing, must heard sing, must was heard to sing, may
Must, can Can ,must Can, can May, must
could have had should have had can have had must have had
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