2017-2018学年（牛津译林版）八年级下学期英语练习： Unit 1 Grammar I.doc

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1、Unit1GrammarI现在完成时定义：表示从过去持续到现在的动作或状态，或已完成但对现在有一定影响的动作。如：Ihavefinishedmyhomework.Wecanplaynow.Shehaseatenthefood.HehaslivedheresincehecametoNanjing.WehavelearnedEnglishfor5years.结构：现在完成时结构:主语+have/has+done(动词过去分词)+….动词过去分词的变化规则：大多数动词的过去分词变化形式同动词的过去式。写出下列动词的过去式和过去分词clean_______

2、_____visit______________stay____________enjoy____________love____________change______________arrive_____________share____________carry____________study_____________marry______________hurry____________plan______________stop_______________chat______________drop____________hit___

3、_________hurt____________put____________cut____________catch____________teach____________bring____________buy____________fall____________eat____________beat____________give____________drive____________shake____________rise____________draw____________grow____________know_______

4、_____fly____________build_______________lend____________spend____________send____________ring____________sing____________run____________come____________肯定句：have/has+done.否定句：have/has+not+done一般疑问句：Have/Has……done?Yes,……have./No,……haven’t.特殊疑问句：特殊疑问词+have/has……done…?注：already常用语

5、肯定句，意思是“已经”，而yet常用于否定句和疑问句，意思是“还”。1.Ihavefoundmybook.already.(否定句)(一般疑问句)(肯定回答)（否定回答）2.Hehasalreadyarrived.(否定句)(一般疑问句)(肯定回答)（否定回答）3.Tomhasjustboughtacomputer.4.Mygrandparentshavelivedheresince1990.关键词：现在完成时时常和already,ever,never,just,recently,yet,since,for,sofar,bythetime,over

6、thepastyears等连用。如：[来源:gkstk.Com]1.She________________________(学习)Englishsinceshewasachild.2.I_______________________(写)fourletterstomypenfriendalready.3.Sofar,he_______________________(参观)manyplacesofinterestintheworld.4.Mysister________________________(跳舞)forabout5years.5.Hob

7、o_______________________(吃)somedelicioussnacksrecently.随堂练习用所给动词的适当形式填空。[来源:gkstk.Com]1.SunshineTown____________________(change)alotovertheyears.2.They____________________(move)twoblocksawaysincetheygotmarried.3.Luckily,thegovernment________________(take)actionstoimprovethesit

8、uationsofar.4.He_____________________(finish)hishomeworkalrea