1、1Unit2 How often do you exercise?知识点1. help with sth. 帮助做某事 help with housework 帮忙做家务(housework 为不可数名词)do housework 做家务 cant help doing sth. 情不自禁做某事;忍不住做某事e.g. She cant help crying. 她忍不住哭了。2. hardly ever 几乎从不(本身具有否定意义 ,不再与其他否定词连用)e.g. She hardly ever plays computer games. ( )She hardly ever doesnt p
2、lay computer games. ()3. twice a week 一周两次 think twice 再三考虑 once a week 一周一次4. be free = have time 有空;闲着 in ones free time 在某人空闲的时间里e.g. Are you free next week? = Do you have time next week? 5. How come? = Why? 为什么呢? 怎么会呢?6. lesson n. 课程;教训 have lessons 上课 give/ teach sb. a lesson 给某人一个教训7. health u
3、.n. 健康 healthy adj. 健康的 keep in good health = keep healthy 保持健康8. ask sb. about sth. 问某人关于某事的情况9. 基数词+ percent 百分之 e.g. 60 percent 百分之六十基数词+ percent of + 名词 e.g. 60 percent of the students 百分之六十的学生(percent of 后接名词或代词做主语时, 谓语动词的单复数取决于后接名词或代词的单复数 。 )e.g. Seventy percent of the boys like playing footba
4、ll. Twenty percent of the water is covered(覆盖) with ice.10not at all 一点儿也不;根本不Not at all! 没关系! 别客气!(可用来回答表示道歉或感谢的话)11. go online 去上网12. the answer to 的答案;的回答13. although 虽然;尽管(相当于 though,但是 though 通常用于句末,前面用逗号隔开)注: although/ though 不和 but 在同一个句子中使用。e.g. Although it rained, the boys still played outs
5、ide.= It rained, but the boys still played outside. 14. the most popular 最受欢迎的(popular 的最高级形式) be popular with 受 欢迎215. by doing sth. 通过做某事(by “通过;靠” )by 的用法复习: by+ 交通工具 “乘坐”e.g. by train 乘火车 by+时间 “到为止” e.g. by Friday 到周五为止 by+ 地点 “在旁边” e.g. by the pool 在水池边16the best way to do sth. 做某事的最佳方式17. spe
6、nd time with sb. 和某人一起度过时光18. Old habits die hard. 旧习难改。19. go to the dentist = see a dentist 去看牙医 teeth cleaning 牙齿清洁20. be afraid of sth. 害怕某事 be afraid to do sth. 害怕做某事21. 辨析: none 与 no onenone “没有一个;毫无 ”既可指人,也可指物;可和 of 连用,后跟不可数名词或可数名词复数;用于回答 how many 或 how much 开头的问句。e.g. None of us went to the
7、park. 我们没有人去公园。no one “没有人 ” 只能指人,不能指物;一般单独使用,不与 of 连用;作主语时,谓语动词用单数;用于回答 who 开头的问句。e.g. No one wants to leave. 没有人想离开。 语法聚焦: 频度副词1. 含义:表示事情发生频率的副词称为频度副词。常用的有:always(总是) ,usually(通常) ,often(经常) ,sometimes(有时) ,seldom(很少) ,hardly ever(几乎从不) ,never(从不)等。2. 位置:频度副词一般用在实义动词前,be 动词、助动词或情态动词之后。 (即:行前be 后)但
8、有时为了强调,也可置于句首。e.g. Lucy is sometimes very busy.Sometimes she goes to school by subway.We never eat junk food.3. 对频度副词提问用 how often“多久一次”4. 表示具体的频率、次数时,一次用 once,两次用 twice,三次及以上用“基数词+ times”。e.g. -How often do you play football? - I play football three times a week.练习题:3 of the books are mine. They are all Jennys.A. No one B. None C. Nothing D. Either