Question

________ does Lin Feng usually clean the floor of his own bed-room? Once a week.

1. A.
   When
2. B.
   What day
3. C.
   How long
4. D.
   How often

Answer 1

D
答案選“D”。英語中要表示“多久間隔”發(fā)生一動作的提問時常用How often結(jié)構(gòu)，回答時常用： once a month，twice a day，every week，sometimes，always，never等時間狀語。而 How long常用來就表示持續(xù)性時間狀語提問的。意為“持續(xù)、延續(xù)多久”。
1)—How often does your mother come to see you?
你媽媽多久來看你一次？
—Often . /Sometimes . / Once a week .
經(jīng)常/有時/每周一次。
2)—How often was he late for work last season?
上季度他遲到過嗎？
—Never. 從來沒有。
3)—How long have you been in the army? —Nearly ten years .
你在部隊服役多久了？近十年了。