八年级英语上unit2 课文讲解
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Section B
Unit 2 How often do you exercise?
What food and drink are unhealthy?
Junk food
cola
junk food
“junk food’’意为“垃圾食品”，指那些仅 仅提供热量，别无其他营养素的食物；或 指提供超过人体需求，变成多余成分的食 品。如：西式快餐中的汉堡、薯条、炸鸡， 中式小吃中的油炸饼、方便面、早餐常吃 的油条、烧饼等。
body n. such adj. & pron. such as together adv. die v. writer n.
身体 这样的；那样的；类似的 例如；像„„这样 在一起；共同 消灭；灭亡；死亡 作者；作家
2a.Rank these activities according to how often you think you classmates do them (1=most often,6=least often)
Ask and answer questions. Use the words from 1a. A: How often do you drink milk? B: I drink milk every day. A: Do you like it? B: No. But my mother wants me to drink it. She says it’s good for my health.
3. at least 至少 例如： We should brush our teeth at least twice a day. 我们每天应该至少刷两次牙。 A good cigarette will smoke at least ten minutes. 一支好烟至少可以抽10分钟。 反义短语：at most 至多
【注意】 1.percent做主语时，谓语动词的数要根据其 后面的名词来确定。 e.g. Fifty percent of the apples are bad. 50%的苹果都坏了。 Twenty percent of the meat is in the fridge. 20%的肉都在冰箱。
2. And twenty percent do not exercise at all! not … at all 意为“一点也不”， not应和 be动词、助动词或情态连用。 e.g. The story isn’t interesting at all. 那个故事一点也没有趣。 They didn’t enjoy the vacation at all. 他们根本不喜欢那次旅行。 The old man can’t use the computer at all. 那位老人一点也不会用电脑。
Questions
1.How often do you exercise? 2.How often do you eat fruit? 3.How mangy hours do you sleep every night? 4.How often do you drink milk? 5.How often do you eat junk food? 6.How often do you drink coffee?
Is the food in the following pictures healthy or unhealthy?
healthy food
Doctors want us to drink milk every day. Because milk is good for our health.
be good / bad for health
Coffee is bad for our health.
potato chips =French fries
be good/ bad for health
Potato chips are bad for health.
be good/ bad for health
6. …the best way to relax is through exercise. through 介词，课文中意为“以，凭 借” e.g. He found the job through an ad in the newspaper. 他通过报纸上的一个广告找到这份工作。
[拓展] through 还有“穿过”之意。表示 “从„„内部穿过”。 e.g. They went through the forest yesterday. 昨天他们穿过了森林。
1. Mom wants me to get up at 6:00 and play ping-pong with her. want to do sth. 想要做某事 want sb. to do sth. 想要某人做某事 want sb. not to do sth.想要某人不要做某 事 Do you want to go to the movies with me? 你想和我一起去看电影吗？ The teacher wants us not to eat hamburgers. 老师不想让我们吃汉堡包。
1a Listen. Then circle your answer to
each question. Is Bill healthy? Yes. No. I don’t know.
Is Katrina healthy? Yes. No. I don’t know.
1b.Listen again. Fill in the blanks in the survey.
Doctors want us not to eat junk food too much. Because it is bad for our health.
soup
salad
cola
dumpling
healthy or unhealthy?
hot dog
tomato
broccoli
onion
--What do you think of junk food? -- Although it’s bad for our health, I love it. I eat it once or twice a week.
4. Although many students like to watch sports, game shows are the most popular. although 连词，“尽管，虽然；即使” e.g. We went fishing although it was cold. 尽管天气很冷，但是我们还是去钓 鱼了。
Doctors want us to eat fruit every day. Because it’s good for our health.
My mother wants us to eat vegetables every day. Because they are good for our health.
How often do you …?
television
body
online
mind
together
New words and phrases
percent online television although through mind n. adj. n. prep. conj. n.
百分之„„ 在线的；联网的 电视节目；电视机 虽然；尽管；即使 以；凭借；穿过 头脑；心智
junk food
fruit
A: How often do you eat fruit? B: I eat fruit every day. A: Do you like it? B: Yes, it’s good for my health. (No. But my mother wants me to eat it. She says it’s good for my health.)
注意：although引导的从句不能与 but连用。 尽管他离家很早，但是他还是迟到 了。 Although he left home early, but he was late.(×) Although he left home early, he was late. (√)
5. It is + adj. to do sth. 干某事是„„ 例如： It is interesting to play computer games. 玩电脑很有趣。 -It is very important _____ make a C plan before a new term. -Yes. You must try to make it carefully. A. of B. for C. to
Tina
Bill
hardly ever never nine never
three or four times a week
every day
every day nine every day
two or three times a week
never
four times a day
How often do you …?
watch TV exercise or play sports go to the movies use the Internet play computer games go camping in the country
2b.Read the article and complete the pie charts on the next page.
vegetables
1a Match the words with the pictures.
b 1. ___ junk food
3. ___ fruit e 5. ___sleep f
a 2. ___ milk
4. ___ vegetables c 6. ___ coffee d
1b
Pairwork
cola
be good/ bad for health
be good/ bad for health?
ice-cream
be good/ bad for health?
hamburgers
be good/ bad for health?
hot dog
junk food be bad for health unhealthy 不健康的 not healthy
Make up your own conversations.
--How often do you eat junk food? -- I eat junk food once a month. -- Do you like it? -- Yes, although it’s not good for my health. -- (No, it’s bad for my health.)
be good for sth.对……有益 be bad for 对……有害 be good at doing sth.擅长 be good to /with sb. 对某人好 Eg: Reading books is good for our study. liu Xiang is goos at running. Miss Wang is good to students.
What Do No.5 High School Students Do in Their Free Time?
Hale Waihona Puke 1. We found that only fifteen percent of our students exercise every day. percent 名词，意为“百分之„„” e.g. Eighty percent of the students in our class exercise every day. 我们班里80%的学生每天都锻 炼。
Unit 2 How often do you exercise?
What food and drink are unhealthy?
Junk food
cola
junk food
“junk food’’意为“垃圾食品”，指那些仅 仅提供热量，别无其他营养素的食物；或 指提供超过人体需求，变成多余成分的食 品。如：西式快餐中的汉堡、薯条、炸鸡， 中式小吃中的油炸饼、方便面、早餐常吃 的油条、烧饼等。
body n. such adj. & pron. such as together adv. die v. writer n.
身体 这样的；那样的；类似的 例如；像„„这样 在一起；共同 消灭；灭亡；死亡 作者；作家
2a.Rank these activities according to how often you think you classmates do them (1=most often,6=least often)
Ask and answer questions. Use the words from 1a. A: How often do you drink milk? B: I drink milk every day. A: Do you like it? B: No. But my mother wants me to drink it. She says it’s good for my health.
3. at least 至少 例如： We should brush our teeth at least twice a day. 我们每天应该至少刷两次牙。 A good cigarette will smoke at least ten minutes. 一支好烟至少可以抽10分钟。 反义短语：at most 至多
【注意】 1.percent做主语时，谓语动词的数要根据其 后面的名词来确定。 e.g. Fifty percent of the apples are bad. 50%的苹果都坏了。 Twenty percent of the meat is in the fridge. 20%的肉都在冰箱。
2. And twenty percent do not exercise at all! not … at all 意为“一点也不”， not应和 be动词、助动词或情态连用。 e.g. The story isn’t interesting at all. 那个故事一点也没有趣。 They didn’t enjoy the vacation at all. 他们根本不喜欢那次旅行。 The old man can’t use the computer at all. 那位老人一点也不会用电脑。
Questions
1.How often do you exercise? 2.How often do you eat fruit? 3.How mangy hours do you sleep every night? 4.How often do you drink milk? 5.How often do you eat junk food? 6.How often do you drink coffee?
Is the food in the following pictures healthy or unhealthy?
healthy food
Doctors want us to drink milk every day. Because milk is good for our health.
be good / bad for health
Coffee is bad for our health.
potato chips =French fries
be good/ bad for health
Potato chips are bad for health.
be good/ bad for health
6. …the best way to relax is through exercise. through 介词，课文中意为“以，凭 借” e.g. He found the job through an ad in the newspaper. 他通过报纸上的一个广告找到这份工作。
[拓展] through 还有“穿过”之意。表示 “从„„内部穿过”。 e.g. They went through the forest yesterday. 昨天他们穿过了森林。
1. Mom wants me to get up at 6:00 and play ping-pong with her. want to do sth. 想要做某事 want sb. to do sth. 想要某人做某事 want sb. not to do sth.想要某人不要做某 事 Do you want to go to the movies with me? 你想和我一起去看电影吗？ The teacher wants us not to eat hamburgers. 老师不想让我们吃汉堡包。
1a Listen. Then circle your answer to
each question. Is Bill healthy? Yes. No. I don’t know.
Is Katrina healthy? Yes. No. I don’t know.
1b.Listen again. Fill in the blanks in the survey.
Doctors want us not to eat junk food too much. Because it is bad for our health.
soup
salad
cola
dumpling
healthy or unhealthy?
hot dog
tomato
broccoli
onion
--What do you think of junk food? -- Although it’s bad for our health, I love it. I eat it once or twice a week.
4. Although many students like to watch sports, game shows are the most popular. although 连词，“尽管，虽然；即使” e.g. We went fishing although it was cold. 尽管天气很冷，但是我们还是去钓 鱼了。
Doctors want us to eat fruit every day. Because it’s good for our health.
My mother wants us to eat vegetables every day. Because they are good for our health.
How often do you …?
television
body
online
mind
together
New words and phrases
percent online television although through mind n. adj. n. prep. conj. n.
百分之„„ 在线的；联网的 电视节目；电视机 虽然；尽管；即使 以；凭借；穿过 头脑；心智
junk food
fruit
A: How often do you eat fruit? B: I eat fruit every day. A: Do you like it? B: Yes, it’s good for my health. (No. But my mother wants me to eat it. She says it’s good for my health.)
注意：although引导的从句不能与 but连用。 尽管他离家很早，但是他还是迟到 了。 Although he left home early, but he was late.(×) Although he left home early, he was late. (√)
5. It is + adj. to do sth. 干某事是„„ 例如： It is interesting to play computer games. 玩电脑很有趣。 -It is very important _____ make a C plan before a new term. -Yes. You must try to make it carefully. A. of B. for C. to
Tina
Bill
hardly ever never nine never
three or four times a week
every day
every day nine every day
two or three times a week
never
four times a day
How often do you …?
watch TV exercise or play sports go to the movies use the Internet play computer games go camping in the country
2b.Read the article and complete the pie charts on the next page.
vegetables
1a Match the words with the pictures.
b 1. ___ junk food
3. ___ fruit e 5. ___sleep f
a 2. ___ milk
4. ___ vegetables c 6. ___ coffee d
1b
Pairwork
cola
be good/ bad for health
be good/ bad for health?
ice-cream
be good/ bad for health?
hamburgers
be good/ bad for health?
hot dog
junk food be bad for health unhealthy 不健康的 not healthy
Make up your own conversations.
--How often do you eat junk food? -- I eat junk food once a month. -- Do you like it? -- Yes, although it’s not good for my health. -- (No, it’s bad for my health.)
be good for sth.对……有益 be bad for 对……有害 be good at doing sth.擅长 be good to /with sb. 对某人好 Eg: Reading books is good for our study. liu Xiang is goos at running. Miss Wang is good to students.
What Do No.5 High School Students Do in Their Free Time?
Hale Waihona Puke 1. We found that only fifteen percent of our students exercise every day. percent 名词，意为“百分之„„” e.g. Eighty percent of the students in our class exercise every day. 我们班里80%的学生每天都锻 炼。