注意点:1.现在完成时与一般过去时的区别:2.短暂动词.join,lose,buy,borrow,leave,go,come,arrive, die,marry, finish,complete,begin,start,break out等.在完成时态中.其肯定式不能和表示一段时间的状语连用.例如不能说:He has finished the work for three hours.要翻译“他已完成工作三小时了. 可采用1)“ago法 :He finished the work three hours ago.2)“延续法 :He has been throughthe work for three hours.3)“since法 :It is/has been three hours since he finished the work. 【
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