how long 指时间的长度,或河流的长度,如:How long can I keep this book?For four weeks.这本书我能借多久?四周
how far指距离,如; How far it from here?离这多远?
how many + 可数名词复数,如; How many books are there on the desk?书桌上有多少本书?
How much + 不可数名词/ how much 表价钱,如:How much wather is there in the glass?
How much it the coat?大衣多少钱?
how often 多久,如:How often do you visit your grandparents?Once a week.
How soon,多久,如:How soon will you finish your homework?In an hour.
how high 多高
how old 多大岁数
等等