GrammarModalVerbspossibility:can/could,may/mightcertainty:must,will,shouldability:can/could,beabletopermission:can/could,may/mightrequests:can/could,will/wouldsuggestions:could/may/might,shallnecessity:must,haveto,havegotto,needadvice:oughtto,hadbetter1.—MayIpickaflowerinthegarden?—,youneedn',,youmustn',youwon''''.—MustIgivemysister-in-lawatelephonecallrightnow?—No,''''''.—ShallItellJohnaboutit?—No,you,I''''',youplaywiththeknife,'t;can''t;'t;'t;shouldn't1.“CanIleavethisdooropenatnight?”“Youbetternot.”.—Shallwegoskatingorstayathome?—Whichdoyourself?''''',butheisn'.—CouldIkeepthisnewEnglish-Chinesedictionaryforaweek?—Yes,,''',''
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