how to swim how to say 怎么說how to produce [經(jīng)濟學]如何生產(chǎn)how to play golf how to get lucky how to do it 如何做how terrible 糟糕how soon 多久；多快；多少時間之后how so 為何如此？how old are you 你多大了；你多大年紀how old 幾歲how often 多長時間一次how much 多少，多少錢how many 多少how long it will take 這個需要多長時間how long 有多久how it feels 是什么滋味；是什么感覺；意味著什么how insensitive how firm a foundation how ever