often 的意思是就是”几常，几频密，几次”，所以没有一定的回答方式。

这要看你要如何表达你的答案，例如人家问你“How often do you have a bath a day " (你一天冲凉几次？）你可以如此回” Once a day"(一天一次)，“twice a day"( 一天两次 )等。如果人家问你：”How often do you go to for a vacation "，你的答案可以是：“Once a month", "Once a year" 等，所以没有一定的回答方式。

1.Do you often go to school by bus 肯定回答是Yes,I do.否定回答是No,I don't.

2.What do you often do on

the weekend I often play football with my friends on the weekend.How do you often go to school

3.often是和一般现在时连用的时间状语。频率副词总是的意思。