how 的几个短语：how often“多常,每隔多久”,用于一般时态,对表示频度的词语进行提问； how soon“多久以后”,用于将来时态； how long“多久”,用于过去时、完成时或其他时态； how many times“多少次”,用于过去时或完成时,对总计次数进行提问； how much“多么,多少”,对程度进行提问,也可以对数量(不可数)或金钱进行提问。
如：How long have you been like this?(你这样已经多久了？)
How often does he wash his face?(他每隔多久洗一次脸？)
单词：how often的近义词、反义词、形近词辨析
how soon/how long/how often
He sent another official to find out how soon the cloth would be ready.他又派了一位官员去看看还要多久布料才能织好。
He asked the doctor how long it had taken him to finish the operation.他问医生动这个手术花了多长时间？
How often does your father let you watch TV?你爸爸让你多久看一次电视？
<辨析>how soon 用来提问别人要“多快”能做好某事，所提问的部分一般是“要过多久以后”或“即刻”等意义的时间状语(如 in two weeks,before long,after March,at once 等)，多用于含将来意义的句子中。how long 用来提问“多长时间”，所提问的部分一般是“一段时间”的时间状语(如 for three days,since last week 等)。how often 意为“是否经常”、“多长时间一次”，所提问的部分一般是表示频度的副词或词组(如 sometimes.seldom,every day,once a week 等)。
与单词：how often 相关的例句或者名人名言
And how often hath a devout believer at the hour of his soul's ascension, been so changed as to fall into the nethermost fire!
