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How often do you exercise?
你多久鍛煉一次?
(1)“how often”是對(duì)表示頻度的時(shí)間狀語(yǔ)的提問(wèn)，可翻譯為“多久(一次)”。例如：
How often do you watch TV?
你多久看一次電視?
【拓展】與how有關(guān)的短語(yǔ)：how far(距離)多遠(yuǎn);how long(時(shí)間)多長(zhǎng);how many多少(只可接可數(shù)名詞的復(fù)數(shù)形式);how much多少(只可接不可數(shù)名詞);how soon(時(shí)間)多久后(事情還要過(guò)多久才發(fā)生);how old(年齡)多大。
(2)exercise做動(dòng)詞時(shí)，可作及物動(dòng)詞，也可作不及物動(dòng)詞。例如：
She exercises two or three times a week.
她一周鍛煉兩三次。
She exercises the dog every day.
每天她都遛狗。
【拓展】exercise作名詞時(shí)，意為“鍛煉;運(yùn)動(dòng)”時(shí)是不可數(shù)名詞，意為“體操;練習(xí)”時(shí)是可數(shù)名詞。例如：
I should eat less food and take more exercise.
我應(yīng)該少吃飯，多鍛煉。
We do morning exercise every morning.
我們每天早上都晨練。
小練習(xí)
1. She often goes to the movies twice a week.(對(duì)劃線部分提問(wèn))
________ ________ ________she ________ to the movies?
2. —______ is Lucky 52 shown on CCTV-2?
—Every week.
A. How long
B. How often
C. How soon
D. How many times
3. There are 35 boys in our class. (對(duì)劃線部分提問(wèn))
________ ________ boys are there in your class?
4. ________ (exercise) helps us keep healthy.(用所給詞的正確形式填空)
5. We do ________ ________(眼保健操) every day.