how long,how often,how soon,how far用法总结
1.Jason stayed here for two weeks.
2.It takes me ten hours to get to London.
3.The river is about 500 meters.
4.He visits his mother once a week.
5.Tom usually play basketball with his friends.
6.He will be back in ten days.
7.It is about two kilometers from my home to school.
一、how long有以下两个主要意思
1. 表示多长时间，与延续性动词连用,主要用来对一段时间(如three days, four weeks 等)提问。

常用“for+一段时间”和“since+时间点”回答
A：How long did he stay here? 他在这儿呆了多久? B：About two weeks. 大约两个星期。

A：How long does it take to get to London from here? 从这里到伦敦要多长时间?
B：At least ten hours. 至少要10个小时。

2. 表示某东西有多长。

如
A：How long is the river? 这条河有多长？ B:About 500 km. 大约500千米。

二、how often的用法
how often用来提问某动作或状态发生的频率，即问某人在一段时间内做某事做了几次。

主要对频度副词或状语(如：always，usually， often， never或twice a day ，once a week, ,three times a month等)
提问。

用英语表示多少次，除了一次（once）和两次(twice)外, 其他都用基数词+times来表示，三次“three times”,五次“five times”。

A：How often does he come here? 他(每隔)多久来一次? B:Once a month. 每月一次。

A：How often do you visit your mother? 你多长时间看你妈妈一次? B:Once a week. 一周一次。

A :How often do you go to the movie? 你多久去看一次电影？ B:Often. 我经常去看电影。

Danny ate breakfast twice last week.上周Danny吃了一次早餐。

Mr. Wood ate breakfast seven times last week.伍德老师上周吃了七次早餐。

）。