帮忙区别几个单词

how long对一段时间提问
e.g lt took me 2 hours to finish my homework.
对2 hours 划线提问：How long did it take me to finish my homework?

How often对频率提问
e.g l go to visit my grandma twice a week
对twice a week划线提问：How often do l go to visit my grandma?

How far 对2点之间距离提问
e.g lt is 10-minute walk from my home to the school.(从家到学校，2点之间距离）
对10-minute walk划线提问：How far is it from my home to the school.]

How much 对多少钱提问
How much does it cost?

一、how long的用法

how long有以下两个主要意思：

1. 表示多长时间，主要用来对一段时间(如three days, four weeks 等)提问。如：

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 指每隔多久，主要用来对频度副词或状语(如：