八年级英语下册 Unit 4 Why don’t you talk to your parents语法小专题同步练习 （新版）人教新目标版.doc

单元语法小专题grammar focus 语法精讲2一、情态动词should和could的基本运用1should 应该(1)should意为“应该”，常用于表示“要求”“劝告”或“建议”。shouldnt为should的否定形式，意为“不应该，不要”。eg：you have a cold.you should stay at home for a few days.你感冒了，你应该在家待几天。the teachers should be friendly to us.they shouldnt be always very strict.老师应该对我们友好。他们不应该总是严厉。(2)should作为情态动词，在句中无主语和人称的变化，后接动词原形。含有should的肯定句变为一般疑问句或否定句时，将should提前或于其后加上“not”即可。eg：cathy taylor should help do some chores at home.should cathy taylor help do any chores at home？cathy taylor shouldnt help do any chores at home.2could意为“能；可能”，用于表示能力，许可及猜测等，具体用法如下：(1)意为“能；能够”，作can的过去式，表示在过去有能力做某事时使用。eg：my uncle could speak two foreign languages when he was in college.我叔叔在上大学时能说两种外语。(2)意为“可以；能”，常用于委婉语气句中，这时通常又用于下面两种情况。第一种：用于礼貌地向别人请求准许。作此用法时，相当于“may”“can”。could 表示的语气比“may”“can” 要委婉得多。eg：could i use your pen，please？我能用一下你的钢笔吗？of course.here you are./oh，sorry，im using it now.当然了，给你。/噢，抱歉，我正在使用。第二种：用于委婉地建议别人去做某事，此时语气比“should”轻。eg：my teachers always give me lots of homework.i dont think i need so much homework.what should i do？我的老师总是给我很多作业。我认为我不需要这么多作业。我该怎么办？you could call up your teachers and tell them your opinion(看法)你可以给你的老师打电话，告诉他们你的看法。二、向对方询问“怎么啦？”及其回答whats wrong/the matter with you？你怎么了？my clothes are out of style./i argued with my best friend.我的衣服过时了。/我和我的好朋友吵架了。语法精炼.根据18中的问题，从ah中选出合适的建议。1sams mother feels really tired.2aisha wants to wear a headscarf(头巾) to school.3johns friend wants to date(约会) his sister.4qing yuan needs some extra(额外的) pocket money.5ken wants to read more books.6su lins friends think her clothes are out of style.7qing yuans stereo(音响) is broken.8her parents cant find a good tutor.ahe could ask his parents for some.bshe shouldnt work so hard.che could go to the library.dthey should help her buy more fashionable clothes.eshe should talk to the principal(校长)fhe could invite her out.gwhy dont they ask the class teacher?hhe could ask for a new one for his birthday.1_2._3._4._5_6._7._8._.按要求完成下列句子。9my bike is broken(对画线部分提问)_ _ _ your bike?10her little daughter could sing this song two years ago.(改为一般疑问句)_ _ _ _ _ this song two years ago?11whats wrong with jack？(改为同义句)whats _ _ with jack?12i often argue with my parents.(提出适当的建议)_13could you ride a bike when you were four？(作肯定回答)_.根据汉语意思完成句子，每空一词。14你应该努力学习英语。you _ _ _ at english.15我们不应该嘲笑别人。we _ _ _ others.16昨天她怎么啦？what _ _ with her yesterday?17我可以借你的自行车吗？_ _ _ your bike?18我该怎么办呀？what _ i _？单元语法小专题(grammar focus).15befac68dhg.9.whats wrong with10.could her little daughter sing11.the matter12.