Question

how long does he often train everyday

辨析时间介词on,in和at 还有how often,how long和how soon every day和everyday 一共三组

Answer 1

1.on和in
“on”用于“具体的某一天“或者”“一个特定的时间”,或者是特定的早晨,中午下午,如on 1st October,on a rainy day,on the morning of his arrival
“in”用于“较长的时间”,如in the 1980s,in the morning
2.how often how long和how soon
“how long”指“多长时间”,主要用来对一段时间的提问,如how long have you known her?(你认识他有多久了),回答是 for 3 days(三天了)
“how often”指“每隔多久”,主要用来对频度副词或状语的提问,如how often does he come here?(他每隔多久来?),回答是 once a week(每隔一周)
“how soon”指“再过多久”,主要是用来对将来时间的提问,如how soon will he be back?(他多久会回来?),回答是 in a week(一周内)
3.every day和everyday
“everyday”形容词：每天的,日常的,平常的,平凡的 例：a suit for everyday wear.适合平日里穿的衣服
“every day”通常做“每天”解作状语时,省掉介词（in),表示频率.I go to school every day.我每天上学 He exercises every day.他每天锻炼