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Unit2 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 can’t help doing sth. 情不自禁做某事;忍不住做某事 e.g. She can’t 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 doesn’t play 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 one’s 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.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 football.
Twenty percent of the water is covered(覆盖) with ice. 10.not… 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 outside. = 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
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15. by doing sth. 通过做某事(by “通过;靠”) by的用法复习:
① by+ 交通工具 “乘坐…”e.g. by train 乘火车 ② by+时间 “到…为止” e.g. by Friday 到周五为止 ③ by+ 地点 “在…旁边” e.g. by the pool 在水池边 16.the best way to do sth. 做某事的最佳方式 17. spend 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 one
none “没有一个;毫无”①既可指人,也可指物;
②可和of连用,后跟不可数名词或可数名词复数; ③用于回答how many或how much开头的问句。 e.g. None of us went to the park. 我们没有人去公园。 no one “没有人” ①只能指人,不能指物;
②一般单独使用,不与of连用;
③作主语时,谓语动词用单数;
④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.
2. 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。
3. 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.
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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:
___ of the books are mine. They are all Jenny’s. A. No one B. None C. Nothing D. Either
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