三、現(xiàn)在完成時表示目前已完成的動作,強調(diào)對現(xiàn)在的影響.時間是算到你說話的時候為止,而且現(xiàn)在完成時有一些標(biāo)志性的時間狀語：1．for+時間段；I have learned English for ten years． 2．常見的副詞：lately；recently,just,up to now,till now,so far,these days,in the past few years/months/weeks/days 3．注意：for+時間段；since+時間點 They have lived in Beijing for five years． They have lived in Beijing since l995． 4．This is the first time that I have watched stars through a telescope． 第幾次做某事,后面跟現(xiàn)在完成時.四、一般過去時表在過去某個特定時間發(fā)生且完成的動作,或過去習(xí)慣性動作,不強調(diào)對現(xiàn)在的影響,只說明過去.常跟明確的過去時間連用,如：yesterday；last week；in 1945,at that time；once；during the war；before；a few days ago；when,注意：1、used to+動詞原形,表過去經(jīng)常但現(xiàn)在已不再維持的習(xí)慣動作.He used to smoke． 2、be/become/get used to+動名詞doing,表習(xí)慣于 He has got used to getting up early． He used to smoke a lot.3、They have lived in Beijing for five years． 用現(xiàn)在完成時表示到目前是5年.He lived in Japan for five years as a middle-school student.用一般過去時則表示這個時間段和現(xiàn)在無關(guān),只表示他過去在日本住了5年.五、過去進行時表示過去某個時間點或某段時間內(nèi)正在發(fā)生的動作.The boy was doing his homework when his father came back from work． He was taking a leisurely walk by the lake when he heard someone shouted for help． 六、過去完成時表示過去某個時間之前已經(jīng)完成的動作,句中有明顯的參照動作或時間,before,after,by,up till There had been 25 parks in our city up till 2000． By the end of last term we had finished the book． They finished earlier than we had expected． 七、一般將來時表示在將來某個時間會發(fā)生的動作或情況.Beijing will host the 29th Olympic Games in 2008． 除此之外一般將來時總是用在一些時間狀語從句或條件狀浯從句的主句中：We will begin our class as soon as the teacher comes． (主句用一般將來時,從句中一定要用一般現(xiàn)在時替代一般將來時.) 在表示對將來的安排時,一般將來時與將來進行時的比較：一般將來時往往表示一種打算、情愿、愿意做某事,所以一般將來時表達的比較主觀,而將來進行時表示將來的安排時是客觀的、必 然的,不強調(diào)主觀愿望,只強調(diào)客觀的安排 The President will be meeting the foreign delegation at the airport． will be meeting,將來進行時,是按照以計劃一定會發(fā)生的事情.八、將來完成時表示在將來某時刻之前已完成的事情,用by+將來的時間 by that time,by the end of this year By the end of next month,he will have traveled 1000 miles on foot． By the time you reach the station,the train will have left． 九、將來進行時表示將來某個時間正在發(fā)生的動作,或按計劃一定會發(fā)生的事情.I'll be doing my homework this time tomorrow． 明天這會我正在寫作業(yè).The President will be meeting the foreign delegation at the airport． 十、現(xiàn)在完成進行時表示從過去延續(xù)到現(xiàn)在并還將繼續(xù)下去或剛剛還在進行的動作：I have been learning English for some ten years． 我學(xué)英語快十年了.(強調(diào)剛剛還在等)