现在完成时pleaseopenthedoor.Ihavealreadyopenedthedoor.Ihaven'thaddinneryet.have/has+doneIhavealreadyhaddinner.Haveyouhaddinneryet?YesIhave.NoIhaven't.
过去分词你规我就规，你不规归我也不规过去式work-worked-workedeat-ate-eaten
现在完成时五大用法Ihavealreadywateredtheflower.一、已经完成的动作，强调对现在有影响。Ihavejustwashedthetoilet。
二、还没有做或者从来没有做过的事Ihaven'ttakenashoweryet.Ihaveneverbeentoshanghai.
三、做一件事做好几次IhaveseenTitanictwice。Hehasbeentoshanghaifivetimes.
四、见过、听过的最......的HeisthefattestmanIhaveeverseen.ThisisthemostbeautifulmusicIhaveeverheared.
五、从过去一直持续到现在的动作或状态（for，since）Hehaslivedinbeijingfor5years.Hehaslivedinbeijingsince1981.sincefor
have/hasbeento,have/hasgoneto去过去那了Sheisnothere.She_____________tothepostoffice.havebeenin(for,since)
