| 词组 | for how long |
| 释义 | how long (ago) • for how long/how long for - How long have you been waiting? (Not *How long ago*) (how long to refer to a period of time) - How long ago did you arrive? - A couple of hours ago. (how long ago to refer to a point of time in the past) - How long is your dining table? (= what length?) - I visited Gibraltar once. - For how long/How long for? (= for what period of time?; for is compulsory with how long here) - I visited Gibraltar once. - How long ago? (= when? ago is compulsory after how long here) |
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