所属成套资源：整册英语人教版新目标初二第一学期 重要知识点讲解
Unit 2重要知识点讲解2021-2022学年人教版八年级英语上册
展开Unit2 How often do you exercie?重要知识点讲解惯用法：1. help sb. with sth 帮助某人做某事2. How about…? ….怎么样？/ ….好不好？3. want sb. to do sth. 想让某人做某事4. How many + 可数名词复数+ 一般疑问句 ….有多少…..5. 主语+ find+ that 从句 …发现…6. It’s + adj.+ to do sth. 做某事是….的7. spend time with sb. 和某人一起度过时光8. ask sb. about sth. 向某人询问某事9. by doing sth. 通过做某事10. What’s your favorite…..? 你最喜欢的……是什么？11 start doing sth. 开始做某事12. the best way to do sth.做某事的最好方式 词语辨析：1. how often 多久一次，用来提问动作发生的频率。回答用：once，twice, three times 等词语。How often do you play sports? Three times a week.how long 多长，用来询问多长时间，也可询问某物有多长。How long does it take to get to Shanghai from here? How long is the ruler?how for 多远， 用来询问距离，指路程的远近。 How far is it from here to the park? It’s about 2 kilometers. 2.free 空闲的，有空的， 反义词为 busy. be free 有空，闲着，相当于 have time.I’ll be free next week. = I’ll have time next week. 还可作“免费的、自由的”解。be free to do sth. 自由地做某事。The tickets are free. You’re free to go or to stay. 3.How come？ 怎么会？ 怎么回事？表示某件事情很奇怪，有点想不通；可单独使用，也可引导一个问句， 相当于疑问句 why, 但 how come 开头的特殊疑问句使用的仍然是陈述语序。How come Tom didn’t come to the party? = Why didn’t Tom come to the party? 4.stay up late 指“熬夜到很晚，迟睡”。 Don’t stay up late next time. stay up 指“熬夜，不睡觉”。 He stayed up all night to write his story. 5.go to bed 强调“上床睡觉”的动作及过程，但人不一定睡着。I went to bed at eleven last night.go to sleep 强调“入睡，睡着，进入梦乡”。 She was so tired that she went to sleep soon. 6.find + 宾语 +名词, 发现 ： We have found him (to be) a good boy.find + 宾语 + 形容词， 发现： He found the room dirty.find + 宾语 + 现在分词， 发现 ： I found her standing at the door. 7.percent 百分数， 基数词 + percent： percent 没有复数形式，作主语时，根据所修饰的名词来判断谓语的单复数。 Forty percent of the students in our class are girls. Thirty percent of time passed. 8.more than 超过，多于，不仅仅， 相当于 over. 在句型转换中考查两者的同义替换。 反义词组为：less than. I lived in Shanghai for more than / over ten years. 9. afraid 形容词， 担心的，害怕的，在句中作表语，不用在名词前作定语。I’m afraid we can’t come here on time. be afraid of sb / sth 害怕某人 / 某事； be afraid of doing sth. 害怕做某事。Some children are afraid of the dark. Don’t be afraid of asking question.I’m afraid + 从句， 恐怕， 担心： I’m afraid I have to go now. 10. sometimes , sometime, some times , some time 的区别：sometimes 频度副词， 有时。表示动作发生的不经常性，多与一般现在时连用，可位于句首、句中或句末。Sometimes I get up very early. ------How often do you get up?sometime 副词，某个时候。 表示不确切或不具体的时间，常用于过去时或将来时，对它用疑问词when.I will go to Shanghai sometime next week. ------When will you go to Shanghai next week?some times 名词词组， 几次，几倍。其中time 是可数名词，对它提问用how many times.I have read the story some times. -------How many times have you read the story?some time 名词短语， 一段时间. 表示“一段时间”时，句中谓语动词常为延续性动词，提问时用 How long.I ‘ll stay here for some time. -----How long will you stay here? (一) 重点句型 1.-----What do you usually do on weekends? -----I often go to the movies. (1) on weekends/on the weekend在周末 (2) go to the movies 去看电影 (3) 第一个do 助动词 第二个do 实意动词 2. hardly ever 几乎从不 hardly ever 相当于 hardly, ever起强调作用。hardly 为副词，意为“几乎不没有）”，相当于almost not，本身具有否定含义，不能再使用其他否定词。 E.g. She hardly eats anything. 辨析: hardly 和hard hard作形容词，意为“困难的，艰苦的，硬的”； hard作副词，意为“努力地，猛烈地”。 hardly意为“几乎不” 3. ----How often do you watch TV? ----Twice a week. (1) how often 意为“多久一次，多长时间一次”，用来提问频率。 (2) twice a week 一周两次 拓展: 一次 once 两次 twice 三次或三次以上 基数词+ times three times four times 4. What's your favorite program? = What program do you like best? 你最喜欢的节目是什么？ 5. How come?怎么回事？怎么会？ 表示某件事情很奇怪，有点想不通；可单独使用，也可引导一个问句。相当于疑问词why。但how come 开头的特殊疑问句使用的仍是陈述语序。 How come you didn't tell me about it? = Why you didn't tell me about it? 6. I go to the movies maybe once a month. 我也许一个月去看一次电影。 maybe 副词，意为“或许，大概，可能”，常位于句首。 E.g. Maybe he knows the way to the park. 辨析：maybe 与 may be maybe副词，作状语，意为“或许，大概，可能”，常位于句首。 may be 属于“情态动词+be 动词”结构，意为“可能是”。 7. Last month we asked our students about their free time activities. ask ab. about sth. 询问某人某事 8. We all know that many students often go online, but we were surprised that ninety percent of them use the Internet every day. The other ten percent use it at least three or four times a week. 我们都知道许多学生经常上网，但是让我们感到惊讶的是90%的学生每天都上网，而另外10%的学生一周至少上网达三至四次。 (1) other: adj. 其他的+名词 the other: adj. 其他的+名词(在特定的范围内) one...the other... 一个....另一个 E.g. One of them is blue，the other ones are purple. 它们的其中一个是蓝色的，其他的是紫色的。 others: 其他的东西 the others: 其他的东西(在特定的范围内) E.g. One of the children likes reading，the others like singing. 后句可替换为the other students like singing. (2) at least 至少 at most 最多，至多 E.g. I have ten yuan in my pocket at most. 9. Most students use it for fun and not for homework. 大多数学生上网是为了娱乐而不是为了写家庭作业。 10. The answers to our questions about watching television were also interesting.关于看电视的调查结果也十分的有趣。 the answers to our questions 问题的答案 dance to the music 和着音乐的节奏跳舞 key to the lock 这把锁的钥匙 11. Although many students like to watch sports, game shows are the most popular. 尽管许多学生喜欢看体育节目，但是娱乐节目是最流行的。 12. It is good to relax by using the Internet of watching game shows, but we think the best way to relax is through exercise. 通过使用因特网看娱乐节目来放松很不错，但是我们认为最好的放松方式是通过锻炼来放松。 (1) It’s +adj.+to do sth 做某事„„的E.g. It’s very easy to learn English well. (2) by doing sth. 通过做某事 (3) the best way to do sth. is做某事的最好方式 13. It is healthy for the mind and the body. 这有益于身心健康。 stay healthy = keep healthy = keep in good health 保持健康 14. Old habits die hard. 旧习难改。 (二)语法知识: 频度副词 1. 频度副词的含义 (1) 表示次数、频率的副词称为频度副词。 常用的频度副词按高低依次为 always > usually > sometimes > seldom > hadly ever > never 100% 80% 60% 30% 10% 0% (2) 表示具体的频率、次数时，一次用once，两次用twice，三次或三次以上用“基数词+times”表示: three times, four times, six times 2. 频度副词在句中的位置 (1 )频度副词一般在实意动词之前，be 动词、助动词或情态动词之后 E.g. We never eat junk food. Lucy is sometimes very busy. I can hardly say a word. (2)有些频度副词也可位于句首，但表示不同含义 sometimes 常位于句首，和位于句中区别不大。 E.g. Sometimes Jack plays computer games. often 用于句首时，通常表示强调，且其前一般有quite，very 修饰 E.g.Very often he goes online. Usually 也可位于句首，其前不用修饰语。 E.g. Usually my father goes up early. Always 一般不用于句首，但可以用在祈使句中。 E.g. Always remember this. 3. 对频度副词提问时，用how often E.g. ---How often do you go to the movies? ---Once a month
