“他多久去购一次物？”“一个月一次。”
(“How often does he go shopping?” “He goes shopping once a month.”)
2. “What do you usually do on weekends?” “ I usually play soccer.”
“周末你通常做什么？”“我通常踢足球。”
第一个do为助动词, 在这起帮助构成疑问的作用；而第二个do则是实义动词。
翻译： What do you usually do on weekends? I often go to the movies.
What does she usually do on weekends? She sometimes go hiking.
4. As for homework , most students do homework every day .
as for...意思是“至于；关于”，常用于句首作状语，其后跟名词、代词或动词的-ing形式（即动
名词）。如： As for him，I never want to see him here. 至于他，我永远不希望在这里见到。
As for the story，you'd better not believe it. 关于那故事，你最好不要相信。
翻译：至于我自己，我现在不想去。 (As for myself, I don’t want to go now. )
至于那个人，我什么都不知道。(As for the man, I know nothing about him.)
5. Mom wants me to get up at 6:00 and play ping-pong with her .
want to do sth. 意思是“想要做某事”；
want sb. to do sth.意思是“想要某人做某事”。如：
Do you want to go to the movies with me？你想和我一起去看电影吗？
The teacher doesn't want us to eat hamburgers.老师不想让我们吃汉堡包。
6. She says it’s good for my health.
be good for...表示“对……有益（有好处）”;其反义为：be bad for...。（这里for 是介词，后跟
名词、代词或动名词）
如：It's good for us to do more reading. 多读书对我们有好处。
Reading in bed is bad for your eyes.在床上读书对你的眼睛有害。
7. How many hours do you sleep every night?
8.percent.百分之......符号为%。
一．作名词 ：数词+percent of(his,her,these,Tom`s) +名词当中的百分之......ten percent of the apples are bad(of 后面的名词是特指的，所以会通常带有定冠词或者其他表特指的限定词）
(如果意义明确，可以单独使用，直接做主语或宾语）A student who gets 90% is graded A.
二．Adj. 百分之......的.
1. 用在名词前做定语，其后不接of .eg. Genius is 10% inspiration and 90% perspiration.
2. I pay him four percent interest.
He gave me four percent of the interest
Eg .She`s richer than 90______ her neighbors
A. Percent B percents C percent for D percent of
9. My eating habits are pretty good . 这里pretty相当于very 。
10. I try to eat a lot of vegetables , usually ten to eleven times a week .
try to do sth.表示“ 尽力做某事 ” ，不包含是否成功的意思而try doing sth.表示“（用某一办法）试着去做某事”。
如: You’d better try doing the experiment in another way.
你最好试试用另一种方法做这个试验。
Although 是连词，相当于though, but
Although, 句中陈述事实，句意中心不在although引导的成分eg. They are still working although they tired,
But: 强调意义的转折， 是句意重心所在 they are tired but they are still working.
Eg. I got up early today,_____i didn`t catch the early bus.
A and B but C so D although