1) 概念:表示過去的過去----|-------|-----|---->其構(gòu)成是had +過去分詞構(gòu)成。那時(shí)以前 那時(shí) 現(xiàn)在 2) 用法 a. 在told, said, knew, heard, thou... [查看全文]
1) 用于完成時(shí)的區(qū)別 延續(xù)動(dòng)詞表示經(jīng)驗(yàn)、經(jīng)歷; 瞬間動(dòng)詞表示行為的結(jié) 果,不能與表示段的時(shí)間狀語連用。 He has completed the work. 他已完成了那項(xiàng)工... [查看全文]
1) since +過去一個(gè)時(shí)間點(diǎn) (如具體的年、月、日期、鐘點(diǎn)、1980, last month, half past six)。 I have been here since 1989. 2) since +一段時(shí)... [查看全文]
Since 用來說明動(dòng)作起始時(shí)間,for用來說明動(dòng)作延續(xù)時(shí)間長度?! have lived here for more than twenty years. I have lived here since I was bor... [查看全文]
1)It is the first / second time…. that…結(jié)構(gòu)中的從句部分,用現(xiàn)在完成時(shí)?!?It is the first time that I have visited the city. It was the ... [查看全文]
1)過去時(shí)表示過去某時(shí)發(fā)生的動(dòng)作或單純敘述過去的事情,強(qiáng)調(diào)動(dòng)作;現(xiàn)在完成時(shí)為過去發(fā)生的,強(qiáng)調(diào)過去的事情對(duì)現(xiàn)在的影響,強(qiáng)調(diào)的是影... [查看全文]
現(xiàn)在完成時(shí)用來表示之前已發(fā)生或完成的動(dòng)作或狀 態(tài),其結(jié)果的確和現(xiàn)在有聯(lián)系。動(dòng)作或狀態(tài)發(fā)生在過去 但它的影響現(xiàn)在還存在;也可表示持續(xù)到現(xiàn)在的動(dòng)作或 狀態(tài)。其構(gòu)成... [查看全文]
意為:"意圖"、"打算"、"安排"、常用于人。常用詞為 come, go, start, arrive, leave, stay等。 I'm leaving tomorrow. Are you staying here till next week? [查看全文]
1)下列動(dòng)詞:come, go, arrive, leave, start, begin, return的一般現(xiàn)在時(shí)表將來。這主要用來表示在時(shí)間上已確定或安排好的事情?! he train leaves at six ... [查看全文]
be to 表示客觀安排或受人指示而做某事?! ?be going to 表示主觀的打算或計(jì)劃?! am to play football tomorrow afternoon. (客觀安排) I'm going to play football tomorrow afternoon. (主觀安排) [查看全文]