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最佳答案：没有at a long time 表达法for a long time 意思是经历了很长时间例句 I have been waiting for a long
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最佳答案：is his hair short?
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最佳答案：可以呀!如:How long have you known himEver since I was a child.=I have known him ever
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最佳答案：how often问的是事情发生的频率回答多是:once,twice,three times.every week/day/year/monthhow soon
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最佳答案：It takes me .to get to school
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最佳答案：From...to...Between...and...For +时间段Since+过去的具体时间Since+时间段+agoSince +从句（一般过去时）
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最佳答案：均可表示“多少”how many 修饰可数名词的复数形式，而how much 修饰不可数---How long is the desk？这张桌子有多长？ ---
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最佳答案：Is the pencil very long?Yes, it is.【希望帮助到你,若有疑问,可以追问~~~祝你学习进步,更上一层楼!(*^__^*)】
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最佳答案：这样理解不对啊,这里的it's 我认为是没有特殊意思,比如 it's OK一样,不能机器式翻译成“它是好的”
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最佳答案：is your desk 80 centimeter longyes it isNo it isn't