Unit 10 since和fo r现在完成时区别+练习 人教版八年级英语下册

这是一份Unit 10 since和fo r现在完成时区别+练习 人教版八年级英语下册，共5页。
八年级英语（下）现在完成时 Unit 10 I’ve had this bike for three years. 含有since和for的现在完成时态since和for是现在完成时当中常见的标志词。since“自从……”，for“持续了……”。since用来说明动作的开始时间，for用来说明动作延续的时间长度考点1 since和for是现在完成时的重要标志（ ）Something ________ in our hometown since 2014. Now it ________ very modern. A. is changed; is looked B. has changed; looks C. changed; looks考点2 since和for的用法（1）since的用法 since+过去的时间点。如：年、月、日、几点等 ☞since 1990 自从1990年起 ☞since 5 o’clock 自从五点起 since+ 时间段+ ago ☞since 3 months ago 自从三个月以前 since+ 一般过去时的从句 ☞since you left home 自从你离开家以后①My grandparents ________ in that city since 2008. A. will live　　　　 B. live C. have lived D. were living ②I'm looking after Tom today. He's been in my house ________ 8：00 this morning. A. at B. since C. for D. till（2）since的一个固定句式“It is＋时间段＋since＋一般过去时的从句”。 It is five years since I came here. 我来这儿5年了。（3）for的用法：for＋时间段（ ）—Did you see Tom yesterday? —No，I ________ him for a long time. A. didn't see　　　　　 B. hasn't seen C. saw D. haven't seen（4）在现在完成时当中，若对since和for引导的时间状语进行提问，都可以用how long来提问。（ ）—________ have you lived in Lanzhou? —Since my parents found jobs here. A. How long　　　 B. How far C. How soon D. How old（5）since和for的句式转换： since＋时间段＋ago＝for＋时间段 They haven't changed since twenty years ago. ＝They haven't changed for twenty years. 他们已经二十年没有改变了。考点3 延续性动词、短暂性动词与since, for 延续性动词表示能够延续的动作。短暂性动词表示不能延续的动作，这种动作发生后立即结束。(1) 若现在完成时的句子中含表示时间段的时间状语(如含since/for引导的时间状语)，则谓语只能使用延续性动词。（ ）—The boy misses his parents very much.—So he does. They ________ the hometown for nearly two years. A. have left　　　　 B. will leave C. have been away from(2) 短暂性动词可以转化为延续性动词①直接换成延续性动词　 buy买→have有　 borrow借→keep保留　 put on穿上→wear穿着 come/go/become来/去/变成→be在/是②转换成be＋名词 join the army参军→be a soldier当兵 join the Party 入党→be a Party member成为一名党员 go to school去上学→be a student成为一名学生③转换成be＋形容词/副词 die死亡→be dead死了 finish结束→be over结束 begin开始→be on 在上映/已开始 leave离开→be away远离的 fall asleep入睡→be asleep睡着的 close关闭→be closed关着的④转换成be＋介词短语 go to school去上学→be in school在上学 join the army参军→be in the army在军队中（ ）Her son ________the army for two months. She misses him very much. A. has joined　　　 B. has been in C. joined D. was in考点4 现在完成时和一般过去时的转换 由延续性动词构成的现在完成时的句子可与由非延续性动词构成的句子相互转换。 I have kept the book for five days.＝I borrowed the book five days ago. 我五天前借的这本书。Mary came to China three years ago.(改为同义句) Mary ________ ________ in China since three years ago.现在完成时since的三种用法1、since+表示过去时间点的词语/短语在这里是作介词使用，since+过去一个时间点，如具体的年、月、日期、钟点、 last month, half past six等，例如：(3)Sally has done her homework since 9:00a.m.Sally从上午9点就做作业了。2、since+含有过去含义的时间状语从句作连词使用，Since用来说明动作起始时间，例如：(1)I have lived here since I was born. 我从出生起就住在这儿了。3、since+一段时间+ago作副词使用，表示从过去某个时间以来到现在的情形或状态，常与ever连用，例如：(1)I have been here since five months ago. 我在这儿，已经有五个月了。复习一下吧根据汉语提示完成句子，每空一词。1. 你能帮助我刷盘子吗？ Could you please help me ________ ________ ________?2. 我爸爸每天至少看两小时的书。 My father reads books for ________ ________ two hours every day.3. 下周举行篮球赛怎么样？ How about __________ __________ __________ ________ next week?4. 请记住起床后整理床铺。 Please remember ________ ________ ________ ________ after you get up.5. 每天按时倒垃圾是必要的。 It’s necessary __________ __________ __________ ________ ________ every day.6. 他太小了，不知道如何叠衣服。 He was too young to know ________ ________ ________ ________ ________.7. 我经常帮助妈妈倒垃圾。 I often help Mom ________ ________ ________ ________.8. 晚饭后， 格林太太常带她的孩子们去散步。 Mrs Green often ________ her children ________ ________ ________ after dinner.9. 他们俩一周都没有做什么家庭作业。 ________ ________ ________ did any homework for a week.10. 我刚坐在电视机前，妈妈就过来了。 ________ ________I sat down in front of the TV, my mom ________ ________.（一）单项选择：（ ）1. Tina was too sleepy. She fell asleep she was reading a book at the table. A. then B. until C. if D. while（ ）2. He found a key on the ground and _ __. A. pick it up B. pick it out C. picked up D. picked it up（ ）3. —We went to a concert last night. It ________ at seven o'clock. —Oh, I________ the clothes at that time. A. started；wash B. starts；was washing C. started；was washing（ ）4. —Peter got an A in the English exam. —________．He isn't good at English at all. A. That's all right B. Of course C. You're kidding（ ）5. Don't go out now, Julia.It is raining ________ outside. A. hardly B. heavily C. luckily（ ）6. Frank believes in himself. He thinks nobody else can ________ him. A. win B. beat C. hit（ ）7. —Mary, I don't like this book. What about you? —We are the same. I don't like it，________． A. too B. yet C. either（ ）8. —Look！The man is wearing such warm clothes on such a hot day. —Yes. How ________ he looks! A. clever B. poor C. strange（ ）9. When you ________ me last night, I ________ the piano. A. were calling；was playing B. were calling；played C. called；was playing（ ）10. Dale was very tired so that he lay down and ________ quickly. A. fell ill B. stayed up C. got up D. fell asleep