2017年九年级英语全册 Unit 12 Life is full of the unexpected语法聚焦（十二）课件 （新版）人教新目标版.pptVIP

* 单元语法聚焦(十二) 过去完成时 一、概念：过去完成时表示过去某一时间或某一动作以前已经完成了的动作。它表示动作发生的时间是“过去的过去”。过去完成时的构成： 肯定句：主语＋had＋动词的过去分词＋其他． 一般疑问句：Had＋主语＋动词的过去分词＋其他？ 二、过去完成时的基本用法： 1．表示过去某一时间或某一动作之前已经完成的动作。eg： Li Ming had learned some English words before he came here. 李明在来这儿之前已经学会了一些英文单词。 By the end of last week，they had finished ten lessons. 到上周末，他们已学完了10节课。 2．表示从过去某一时间开始，一直延续到过去另一时间的动作。eg： I had been at the bus stop for 20 minutes when a bus finally came.当公交车最终来到的时候，我已经在公交站点等了20分钟了。 It rained yesterday after it had been dry for several months. 在天已经干旱了几个月后，昨天终于下雨了。 3．过去完成时＋before/when/by the time＋一般过去时(动作在后)。eg： The class had begun before I got to school. 在我到学校之前，课就开始了。 When I arrived at home，my mother had left. 当我到家的时候，我妈妈已经走了。 4．一般过去时(动作在后)＋after/until＋过去完成时(动作在前)。eg： After I had finished my homework，I had my lunch.我做完作业后才吃午饭。 He didnt go home until he had planted all the trees.直到植完所有的树他才回家。 5．用于宾语从句中。eg： He said he had studied English for two years. 他说他学英语两年了。 I told him I had been to Japan twice. 我告诉他我去过日本两次。 一、用括号中所给词的适当形式填空。 1．When I returned home，he __________(leave)． 2．By ten oclock yesterday evening，she _______________(finish) writing her homework. 3．He ____________(study) English for five years before he went abroad. 4．It ____________(stop) raining when I woke up this morning. 5．I ____________(not read) the book because I had read it before. had left had finished had studied had stopped didn’t read 6．By the time I reached home，my mother ___________(cook) supper already. 7．The little girl ______________(lie) in bed for almost a month since she _______(fall) sick. 8．He told his mother that he __________(run) out of money to buy new clothes. 9．I suddenly remember that I _________(leave) the key in my classroom when I ______(get) home yesterday. 10．Our math teacher ___________(teach) in our school for 20 years and he _________(come) here when he was 25 years old. had cooked had lain fell had run had left got had taught came