7. exercise的用法。

　　　 (1)作可数名词复数exercises。意为“运动、体操”。

　　　 (2)作不可数名词，意为“练习、习题”。

　　　 eg：I have to do so much exercise.

　　　 He bought a new exercise book.

　　　 (3)作动词，意为“练习、运动”。

　　　 eg：-How often do you exercise?

　　　 -I exercise every day.

　 课文解析SB. 3a

　　　 …but I’m pretty healthy. I exercise every day, usually when I come home

　　　 from school. And my eating habits are pretty good. I try to eat a lot of

　　　 vegetables, usually ten to eleven times a week. And I eat fruit every day

　　　 and I drink milk every day. Of course, I love junk food, too, but I try to

　　　 eat it only once a week, oh, and I sleep nine hours every night. So you

　　　 see, I look after my health. And my healthy lifestyle helps me get good

　　　 grade. Good food and exercise help me to study better.

6. want sb to do.意为“想让某人做某事”。

　　　 eg：He wants me to do exercise every day.

　　　 His mother wants him to be a reporter.

　　　 有很多动词后面用这种结构做动词的复合宾语。

　　　 如：ask sb. to do sth.

　　　 tell sb. to do sth.

　　　 help sb. (to) do sth.等

5. as for意为“就……而论”，“至于”

　　　 eg：As for fruit，I eat it sometimes.

4. be good for意为“对……有好处”，其反义词为“be bad for”。

eg：Drinking milk is good for your health.

　　　 Eating too much sugar is bad for your teeth.

　　　 Reading English is good for studying English.

3. time表示不可数名词，意为“时间”。

表示可数名词，意为“次数，倍数”。

　　　 eg：What time is it?

　　　 Time and tide never wait for men.

　　　 I go to the movies three times a week.

　　　 The size of the new museum is four times larger than the old one.

　　　 注意“次数”的表达方法

　　　 一次 once

　　　 两次 twice

　　　 三次或三次以上用基数词加上times，three times、five times、one hundred times.

　　　 表示“……几次”的表达方法是：twice a month、once a month、three times a week、once a year.

2.. 疑问词how的用法

　　 (1)怎样，用什么手段，方法。

　　　 How did he do it?

　　　 I don’t know how to swim.

　　　 (2)情况如何(指身体健康状况)

　　　 How are you?

　　　 How’s it going with Tom?

　　　 (3)how many，how much表示“多少”

　　　 how many后接可数名词复数，how much接不可数名词。

　　　 How many times do you go to the park?

　　　 How many tickets do we need?

　　　 How much water is there?

　　　 How much are those pants?

　　　 (4)how often是对动作发生的“次数”提问

　　　 eg：How often do you play tennis?

　　　 How often do you surf the internet.

1. How often do you exercise?

　 你多久锻炼一次？

　 ( 1 ) how often… 多久 …how often 是针对动作发生的频率提问，回答应该是频率副词或表频率的副词词组，如 once, very often, every day, never 等。

　　 e.g. － How often do you watch TV? 你多久看一次电视？

　　 　 － Twice a week. 一周两次。

　　 e.g. How often does he go back to London? 他多久回一次伦敦？

　　　　 Once a year. 一年一次。

　　　 (一次 once, 两次 twice, 三次或三次以上用 times .e.g. 4 times 4 次； some times 几次。)

　 ( 2 ) exercise 这个词可以用作动词，也可以用作名词，在这个句子中是用作动词，意为“锻炼”。

　　 e.g. You should exercise more.

　　　 你应该多锻炼(运动)。

　　 exercise 作名词时，可以是可数名词，也可以是不可数名词。

　　 e.g. Walking is good exercise.

　　　 　散步是很好的运动。(不可数)

　　 e.g. We do English exercises every day.

　　 　 我们每天做英语练习。(可数)

6. as for homework谈及到家庭作业

　　 as for sth. / sb. 谈及某事/某人，如：

　　 (1)as for the book Harry Potter谈起《哈利·波特》这本书

　　 (2)as for my father谈到我的父亲

Section B

5. Most students exercise three or four times a week.

　　 大多数学生一周锻炼三或四次。

　　 (1)exercise v. 做操；exercise n. 体操；do exercises练体操

　　 (2)time次数

　　 time and time again千万次的

　　 (3)three or four times a week一周三四次

　　 表示一周/月/年多少次，可以用... times a week / month /

year，注意有两个词有单独的表示法，“一次”用“once”，“两次”用“twice”。

(4)不定代词all“全部”，most“大部分”，some“一些”，no“没有一个”的用法，这些词可以在句中作主语、宾语、表语或定语。

　　　 eg：All the waiters in the restaurant are very busy.

　　　 All the students in our school have to wear school uniforms.

　　　 I know most people in this party.

　　　 Gina has some beautiful scarfs.

　　　 No children can sing this song.

4.. Here are the results of the student activity survey at Green High School.

　　 这儿是Green高中的学生活动调查结果。

　　 (1)the results of……的结果。如：

　　 the results of the English contest

　　 英语比赛的结果

　　 (2)as a result由于，因此。如：

　　 As a result, Qing Hua becomes the first-class university.

　　 因此，清华成为一流的大学。

　　 (3)at Green High School在格林高中

　　 在学校用介词at。如：

　　 at Junior School在初中

　　 at Primary School在小学