作者:吴旭长时间学习英语计算机区别提问推销员用法认识频度副词小时
摘要:三者均可译为"多久",但有区别:1.how long指多长时间,主要用来对一段时间提问。如:How long have you known her?你认识她有多久了?How long have yon learnt English?你学习英语多久了?How long have you been a computer salesman?你当计算机推销员多久了?A:How long did he stay here?他在这儿呆了多久?
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