Revisionof Units 1-3频度副词1)always: adv. 总是, 一直她总是乘公交去学校。She always goes to school by bus. 2) usually: adv. 通常 often: adv. 经常我们经常放学后写家庭作业。We usually/often do homework after school.Language points3) sometimes: adv. 有时有时，我步行去公园。Sometimes I walk to the park.4) hardly ever: 几乎很少, 几乎不我几乎不看电视。I hardly ever watch TV.5) never: adv. 从不, 决不她从来不停止工作。She never stops working.其他表示频度的短语every day once a week/month/year twice a week/month/year three times a week/month/year four times a week/month/yearsometimes与几个形似的词的区别 sometime是副词, 意为“某个时候”, “某时” 。她将要某个时候去北京。 She is going to Beijing sometime . b. some time是名词词组, 意为“一段时间”，做时间状语用。我将等一段时间。I m waiting for some time. c. some times是名词词组, 意为“几次,几倍”。 上个月我见过他几次。 I met him some times last month. be good for 对有益Vegetables are good for our health. 蔬菜对我们的健康有益。be bad for 对有害Junk food is bad for our health. 垃圾食品对我们的健康有害。. but Im pretty healthy. 但是我很健康。pretty adv. 非常pretty 做副词时表示程度上加深, 可以修饰形容词。pretty good 非常好 pretty happy 非常开心try v.努力，尝试 try to do sth. 尽最大努力做某事I try to eat a lot of vegetables. 我尽量吃很多蔬菜。 try doing sth. 试着做某事He tries making this plan. 他试着制定这个计划。help v. 帮助help sb. with sth. 在某方面帮助某人他帮助我学历史。 He helps me with my history. help sb. (to) do sth. 帮某人做某事他帮助我打扫房间。 He helps me (to) clean the room. have vt. 患(得)病一般情况下用havean. 表示患了某种疾病。如：have a cough 咳嗽have a cold 感冒He had a bad cold last week.他上周患了重感冒。She often has a stomachache. 她经常胃疼。嗓子疼, 喉咙疼背疼感冒头疼牙疼have a sore throathave a sore backhave a backachehave a coldhave a headachehave a toothache表示身体不适的常用词组:Im not feeling well. 我感到不舒服, 也可说成I dont feel well。feel在句中是系动词, 意为“觉得, 感觉”。类似的答语还有:I feel terrible. 我感到不舒服。I feel ill. 我感觉生病了。1) a balance of平衡keep a balance of 保持一个平衡keep a balance of nature保持自然（生态）平衡。2) be healthy, keep healthy, stay healthy,keep in good health都是保持健康的意思。healthy是形容词, 其名词形式为health.maybe 副词 “也许, 可能“, 常用于句首 。may be 意思是“也许是, 可能是”, may是情态动词, be是动词原形 。 也许她是对的。Maybe she is right.She may be right.too much “太多”, 常用来修饰不可数名词, 一般情况下, 能用much修饰的就用too much。我今天有太多工作要做。 I have too much work to do today.much too “太”，副词短语。常用来修饰形容词或者副词 。他太聪明了。He is much too clever.动词不定式作主语时, 常用 it 作形式主语, 而把不定式放在后面。即: It is + adj. + 动词不定式 ( to do )饮食平衡是很重要的。To eat a balanced diet is important. =Its important to eat a balanced diet. Im going to Tibet for a week. 我要去西藏一个星期。 for 通常接表示一段时间的词组。 We walked for two hours. 我们走了两个小时。 Im in this city for 10 years. 我在这个城市10 年了。go swimming go camping go skating go fishing go hiking go bike riding go horse riding 去游泳 去野营 去滑冰 去钓鱼 去徒步 去骑车 去骑马“go + v-ing”是一种固定结构, 意思是“去”其中的动词多表示户外活动。 例如：think about 意思是“考虑”, 其中about是介词, 后接名词、代词或动词的-ing形式。例如： Let me think about this book.让我考虑一下这本书。 I thought about buying a new car.我考虑过买辆新车。动词plan作“计划；打算”解, plan on doing sth.plan to do sth. 计划做某事She plans on hiking.她计划去徒步旅行。Were planning to visit London this summer.我们打算今年夏天参观伦敦。1. It + takes sb + some time + to do sth 表示做某事花了某人多少时间。例如:做作业花了我半天时间。 It took me half a day to do my homework.1) sb + pay + 金钱 + for + 物表示某人花钱买某物。她要花50元买这本字典。 She paid 50 yuan for this dictionary. 2) sb + spend +时间/金钱 (in) doing sth. 如: 他玩了两小时电子游戏。 He spent two hours (in) playing computer games. 3) sb + spend +时间/金钱 on sth. 如: 她买那本书花了10元。 She spent 10 yuan on the book. leave v. 离开 leave for 表示“动身去”她明天要去北京。 Shes leaving for Beijing tomorrow. leave A for B 离开A到B她明天要离开上海去日本。 Shes leaving Shanghai for Japan tomorrow.taketo带（某人或某物）去（某地）他明天要带我们去动物园。 Hes taking us to the zoo tomorrow.请把这些书带到教室去。 Take the books to the classroom, please.1. The old man _ (锻炼)every morning. 2. I often _ (购物)on weekends. 3. We must _(保持 )our classroom clean. 4. There are some _(不同) between the two pictures. Fill in the blanks.exercisesshopkeepdifferences5. He _ (几乎不)goes to restaurant for dinner. 6. Katrina doesnt often _ (喝)coffee, she likes green tea. 7. My eating _(习惯) are not very good. 8. Everyone must _(设法) to work hard.hardly everdrinkhabitstry9.The old woman feels _ (疲劳)after a long walk. 10. His son has a _ (头疼). 11. I have a _ _(嗓子疼),so I cant speak a word. 12. I brush my _ (牙)twice a day. 13. The little boy eats too much, he has a _(胃疼).tiredheadache sore throatteethstomachache. 单项选择1. I like English very much, so I _ listen to the tape in the morning.A. usually B. hardly ever C. never2. Milk is good _ our _.A. to; healthy B. to; health C. for; healthy D. for; health3.What does your father do in the evening?He usually _.A. watch TV B. exercise C. reads booksA D C 4. _ do you go skating? Every day.A. How often B. How many C. When 5. Most students in my class _ exercise every day. A. does B. do C. is doing D. are doing 6. _ students in your class are from Beijin