過(guò)去完成時(shí)與現(xiàn)在完成時(shí)的區(qū)別

過(guò)去完成時(shí)與already，ever，just，never，“since＋時(shí)間點(diǎn)”，“for＋時(shí)間段”等連用時(shí)，強(qiáng)調(diào)事件發(fā)生的先後順序，不涉及現(xiàn)在的情況?，F(xiàn)在完成時(shí)強(qiáng)調(diào)的是“過(guò)去的動(dòng)作或狀態(tài)對(duì)現(xiàn)在造成的影響”。如：

She has worked in Chongqing for over two years.她已經(jīng)在重慶工作兩年多了。(現(xiàn)在仍在那兒工作)

She had worked in Chongqing for over two years before she moved to Shanghai.她在搬到上海之前已經(jīng)在重慶工作兩年多了。(“搬到上海”是過(guò)去，“在重慶工作”發(fā)生在過(guò)去的過(guò)去)

He has never seen such an interesting film before.他以前從未看過(guò)這麼有趣的電影。(“看”盡琯發(fā)生在過(guò)去，但涉及現(xiàn)在，即現(xiàn)在已經(jīng)知道或了解了這部電影)

He said he had never seen such an interesting film before.他說(shuō)他以前從沒(méi)看過(guò)這麼有趣的電影。(“他說(shuō)”發(fā)生在過(guò)去，“看過(guò)”是在“說(shuō)”之前，是過(guò)去的過(guò)去)