八下单元语法小专题

1、单元语法小专题 Grammar Focus语法精讲一、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 shouldntwas in college.我叔叔在上大学时能说两种外语。(2)意为“可以；能”，常

2、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：be always very strict.老师应该对总是严厉。友好。他们不应该(2)should 作为情态动词，在句中无主语和人

3、称的变化，后接动词。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：My teachers always give me lots of.Idont think I need so much.What should I do？Cathy Taylor should help do some chores home.Should Cathy Taylor help do any chores home？Cathy Taylor shouldnt help do any chores home.2could 意为“能；可能”，用于表示能

4、力，及猜测等，具体用法如下：at atat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 opinion(看法)你可以给你的老师打的看法。l them your们你，二、方询问“怎么啦？”及其回答(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 heWhats wrong/the matter with you？你怎么了？My clothes are out of style./I a

5、rgued with my bestfriend.衣服过时了。/我和好朋友吵架了。语法精炼.根据 18 中，从 AH 中选出合适的建She should talk to the principal(校长)He could invite her out.Why dont they ask the class teacher?He 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。My bike is broken(对画线部分提问)your bike?Her little daughter could si

6、ng this sono years ago.(改为一般疑问句)议。Sams mother feels really tired.Aisha wants to wear a headscarf(头巾) to school.3Johns friend wants to date() his sister. Qing Yuan needs some extra( 额外的) money.Ken wants to read more books.pocketSu Lins friends think her clothes are out of style.Qing Yuans stereo(音响)

7、is broken.8Harents cant find a good tutor.He could ask his parents for some.She shouldnt work so hard.He could go to the library.this sono 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)D They should help her buyclothes.morefashionable15不应该嘲笑别人。We others.昨天她怎么啦？What with her yesterday?我可以借你的自行车吗？your bike?我该怎么办呀？What I ？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.单元语法小专题(Grammar Focus).15BEFAC68DHG.9.Whats wrong with10.Could her little daughter sing11.the matter12.I thin