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一、语法重点1.现在完成进行时由have/has been+doing构成(第三人称单数用has,其它用have),主要表示在现在之前这一段时间里一直在进行的动作,这个动作可能仍然在进行,也可能已经停。【例】I have been studying at a tutorial centre for
1. Grammatical emphasis 1. Now that it is completed, it consists of has/has been+doing (the third person singular uses has, and other uses have). It mainly indicates the actions that have been performed during the current period of time. This action may still be It may or may already be stopped. 【例】I have been studying at a tutorial centre for