对频率提问,用 how often ,再加疑问句语序
所以变为 How often does your mother eat junk food?
for an hour 是对时间长度提问,所以用how long
How long does Bob do his homework every evening?
How often does your mother eat junk food?
How long does Bob do his homework every morning?
never是表示频率的副词
所以疑问句为How often does your mother eat junk food?
for an hour 表示时间长度
How long does Bob do his homework every morning?
垃圾食品对我们的健康没好处
Junk food is not good for our health.
杰克每周做三到五次作业
jack does his homework three to five times every week
虽然我很喜欢玩电脑游戏,但我很少上网
Although I like to play computer games, but I seldom surf the Internet