一，how much有两种含义。

1、问多少。How much +不可数名词，意思是某某东西有多少。回答是数量，有多少。例:How much milk do you drink A bottle of milk.2、问价钱。How much +名词，意为某某东西多少钱。回答多少钱。How much is it It is 1 dollar.二，howlong表示多长。时间多长。回答 one hour等等How long does it take you to finish your homework Three hours.三，How far表多远。回答距离多远How far is it from your home to school It is 1000m.