simple-past-and-present-perfect-过去式-现在完成时-比较

SimplePastandPresentPerfectUsage•sthhappenedinthepast•action,situationinthepastVSinfluencetotoday•yesterday,lastweek,in1998,justnow…Jackdidn’twatchmovielastyear.•for,since,ever,already,yet…Jackhaven’twatchedmoviesincelastyear.IhadagoldfishwhenIwasachild.Ihavehadmanyotherfishsincethen.Let’stalk!•Haveyouhadyourbreakfast?•Whendidyouhaveit?•Howlonghaveyoubeenateacher?•Didyouenjoyyourwork?Whatdidyoudolastweekend?Haveyoueverbeentoabroad?7Usage•sthhappenedinthepast•action,situationinthepast(specifictime)VSinfluencetotoday