2020暑假预习：初中英语8年级上册 unit2 How often do you exercise? 语法专项---频率副词及习题（含答案）

unit2 语法专项--频率副词等 (含习题) 频率副词 概念：是表示某事发生频率的副词，即用来表示某事在一段时间内所发生的次数。 always， usually， often， sometimes，hardly， never，是英语中最常见的几个频率副词。 位置：一般放在行为动词之前，be动词、助动词及情态动词之后。 辨析：含义和程度的区别 always的频率是100％，意为“总是;永远地”。 usually的频率是70％左右，意为“通常;平常”。 often的频率是50％左右，意为“常常”。 sometimes的频率是20％左右，意为“有时”。 hardly的频率是5％左右，意为“几乎不;简直不”。 never的频率为0，意为“从来不;永不”。 always > usually > often > sometimes > hardly > never 其他：一些表示频率的词组，如 once a week， twice a month，three times a year， four times a year等，它们准确地表达出事情发生的频率。 我每天喝牛奶，吃蔬菜。I drink milk and eat vegetables every day. 我每周锻炼一次。I exercise once a week. 我一年去看望我奶奶四次。I visit my grandmother four times a year. 拓展： 辨析：how often/how soon/how long/how far的区别 how often 表示“多长时间一次或每隔多久”，就做某事的频率提问。对 how often的回答一般是“ twice a year”,“ three times a week”等 你多长时间看你妈妈一次? --How often do you visit your mother? 一周一次。 --Once a week how soon 表示“多久之后”，侧重某人/某事能多长时间完成。对 how soon的回答一般为:“in+时间段”。如in two days, in five years 他要多久回来? --How soon will he be back? 一小时以后。 In an hour. how long 表示“时间多久或物体多长”，表示时间时，侧重指“一段时间”。回答一般是时间段，如for three days，three years 他在这儿待了多久? -- How long did he stay here? 大约两个星期。 --About two weeks. how far 表示“多远” ,对距离进行提问 这儿离动物园有多远? --How far is it from here to the zoo? 6千米 --It's 6 kilometres. 辨析：sometimes，sometime，some times，some time的区别 sometimes频度副词。意为“有时”，多用于一般现在时，对它进行提问常用how often sometime:副词，意为“在某时（过去或将来）”，表示的是不确切或尚末确定的时间。对它提问用when。 some times:名词短语。意为＂几次，几倍”。time此处是可数名词，对它提问用how many times some time：名词短语。意为“一段时间”。time是不可数名词，对它提问用how long 综合练习： --_____do most Chinese people have meals? --Three times a day. A How long B How many C How often D How much Mr. Brown_____exercises, so he is very fat. A often B sometimes C always D never Li Ming is kind and helpful， but he is also a little careless_____. A sometime B some times C sometimes D some time 4.I _____play football on Friday afternoon. A sometime B sometimes C some time D some times 5. Designated drivers(代驾司机) are _____seen in our city because drunk driving is not allowed. A seldom B hardly C always 6.Anna_____gets up at 6: 40 a.m., but she gets up at 7: 30 a.m. today. A never B usuall C also D really 7.-- You play the piano so well. _____do you take piano lessons? --I go to piano lessons twice a week. A How long B How many C How often D How much 8.--Books are our friends._____ do you read books? --I read books every day. A How often B How soon C How long 9.-- Do you usually_____the bus to wo ... ...