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1.How often do you exercise? 你(你們)多久鍛煉一次身體?
How often + 助動詞do(does或did) + 主語 + do sth.? 疑問詞how often是問頻率(多久一次),(在這里助動詞do(does或did) 是起幫助構成疑問的作用)與一般現在時或一般過去時連用，回答一般是用表示頻率的副詞，如：once, twice, three times…, sometimes, often, quite, often, never, every day, once a week , twice a month , three times a month , three or four times a month等。
How often do you go to the factory? Twice a week.你們多久到工廠去一次? 每星期兩次。
“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。”
第一個do為助動詞, 在這起幫助構成疑問的作用;而第二個do則是實義動詞。
翻譯：What do you usually do on weekends? I often go to the movies.
What does she usually do on weekends? She sometimes go hiking.
3. “What’s your favorite program?” “It’s Animal World.”
“你最喜歡什么節(jié)目?”“動物世界。”
4. As for homework , most students do homework every day .
as for...意思是“至于;關于”，常用于句首作狀語，其后跟名詞、代詞或動詞的-ing形式(即動名詞)。如：
As for him，I never want to see him here. 至于他，我永遠不希望在這里見到。
As for the story，you'd better not believe it. 關于那故事，你最好不要相信。
至于我自己，我現在不想去。As for myself, I don’t want to go now.
至于那個人，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?你想和我一起去看電影嗎?
The teacher doesn't want us to eat hamburgers.老師不想讓我們吃漢堡包。