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alwaysadv.①总是eg:Healwayscomeslate.他总是迟到。②永远侞eg:Ishallalwaysremembermyfirstdayatschool.我将永远记住我上学的第一天。usuallyadv通常，经常oftenadv①多次；时常eg:Howoftendoyougothere?你多久去那里一次？Howoftenyouhavebeenabroad?Nooften,onlytwice.你出国几次了？不多，只出去过两次。②经常；通常eg:Childrenoftendislikehomework.孩子们通常都不喜欢家庭作业。Heoftendoesthis.它经常干这种事。sometimesadv有时，时不时地，eg:Isometimesthinkthatitisagreatmistake.我有时想这是一个大错。SometimesIhelpmymotherinthehouse.有时候我帮助妈妈做家务。程度的频繁到不频繁：always总是--usually通常--often经常--sometimes有时-never从不