八年级上册频率副词.ppt

频率副词a d v e r b s o f f r e q u e n c y大家好1 频率副词一般用来表示动作发生的频率，次数往往放在句子中间，实义动词之前，非实义动词之后;非实义动词分为:1 系动词be.2 助动词 帮助动词构成时态(do,does,will,shall,have,had,has).3 情态动词(must,can,may)。除此之外，都叫做实义动词大家好2usually (80%)经常often (60%)通常always (100%)总是sometimes (40%)有时seldom (20%)很少hardly ever/rarely (10%)几乎不never （0%）从不日常频率副词大家好3how often 用于提问once,twice,three times a week,every day 用于回答次数询问次数例：-How often do you go swimming?你通常多久去一次游泳？-I go swimming twice a week.我每周去游泳两次。大家好4 1.频率副词用在be动词后。He is always late for class.他经常迟到。2.频率副词用在主要动词前。My father usually walks home.我的父亲经常步行回家。3.频率副词用在助动词与实义动词之间。I will always love you.我将永远爱你。4.在答句中,频率副词必须放在助动词前。Do you often go there?你常去那里？(误)Yes,I do often.是的,我常去。(正)Yes,I often do.是的,我常去.用法大家好51.What do you usually do on weekends?I sometimes go to the beach.2.How often do you eat vegetables?Every day.3.Most students do homework every day.总结句型大家好6谢谢大家好7