频率副词:一般用来表示动作发生的频率。一般放在be动词之后或者助动词与主要动词之间但sometimes、often等还可以放在句首或句尾,usually可放在句首,once可放在句尾,twice、threetimes等一般放在句尾。如:sometimesigetupearly.(我有时起得早)/theworkersusuallyhavelunchatthefactory.(工人们通常在厂里吃午饭)/takethismedicinetwiceaday.(这种药一天吃两次)1.频率副词是表示与次数,频率有关的副词,如:always(总是),usually(通常),frequently(经常)often(经常)sometimes(有时),seldom(不常),rarely(极少),never(从不)once(一次),twice(两次),等。2.频率副词等级:allthetime100%;almost,always90%;generally,usually80%;often,frequently60-70%;asoftenasnot40-50%;sometimes,attimes20-30%;occasionally,fromtimetotime10%;hardly,seldom,rarely5%;never0%。3.频率副词用在be动词后。healwaysgetsupat6:30.他经常六点半起床。4.频率副词用在主要动词前。myfatherusuallywalkshome.我的父亲经常步行回家。5.频率副词用在助动词与实义动词之间。iwillalwaysloveyou.我将永远爱你。6.频率副词用在oughtto之间。yououghtoftentowritetoyourmother.你应该常给你母亲写信。7.在答句中,频率副词必须放在助动词前。doyouoftengothere?你常去那里吗?(误)yes,idooften.是的,我常去。(正)yes,ioftendo.是的,我常去。8.never(从不),seldom(很少,不常)用于句首时,句子要用倒装形式以加强语气。neverhaveibeenthere.我从未去过那里。seldomdoiwatchtv.我很少看电视。频率副词位置记忆口诀:be后实动前助主间对频率提问用howoften或howmanytimes