1、單元語(yǔ)法小專題 Grammar Focus語(yǔ)法精講一、情態(tài)動(dòng)詞 should 和 could 的基本運(yùn)用1should 應(yīng)該(1)should 意為“應(yīng)該”，常用于表示“要求”“勸告”或“建議”。shouldnt 為 should 的否定形式，意為 “不應(yīng)該，不要”。eg：You have a cold.You should stay at home for a few days.你感冒了，你應(yīng)該在家待幾天。The teachers should be friendly to us.They shouldntwas in college.我叔叔在上大學(xué)時(shí)能說(shuō)兩種外語(yǔ)。(2)意為“可以；能”，常

2、用于委婉語(yǔ)氣句中，這時(shí)通常又用于下面兩種情況。第一種：用于禮貌地向別人請(qǐng)求準(zhǔn)許。作此用法時(shí)，相當(dāng)于“may”“can”。could 表示的語(yǔ)氣比“may”“can” 要委婉得多。eg：Could I use your pen，please？我能用一下你的鋼筆嗎？Of course.Here you are./Oh，sorry，Im using it now.當(dāng)然了，給你。/噢，抱歉，我正在使用。第二種：用于委婉地建議別人去做某事，此時(shí)語(yǔ)氣比“should”輕。eg：be always very strict.老師應(yīng)該對(duì)總是嚴(yán)厲。友好。他們不應(yīng)該(2)should 作為情態(tài)動(dòng)詞，在句中無(wú)主語(yǔ)和人

3、稱的變化，后接動(dòng)詞。含有 should 的肯定句變?yōu)橐话阋蓡?wèn)句或否定句時(shí)，將 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 意為“能；可能”，用于表示能

4、力，及猜測(cè)等，具體用法如下：at atat老師總是給我很多作業(yè)。我認(rèn)為我不需要這么多作業(yè)。我該怎么辦？You could call up your teachers and opinion(看法)你可以給你的老師打的看法。l them your們你，二、方詢問(wèn)“怎么啦？”及其回答(1)意為“能；能夠”，作 can 的過(guò)去式，表示在過(guò)去有能力做某事時(shí)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.衣服過(guò)時(shí)了。/我和好朋友吵架了。語(yǔ)法精煉.根據(jù) 18 中，從 AH 中選出合適的建She should talk to the principal(校長(zhǎng))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(對(duì)畫線部分提問(wèn))your bike?Her little daughter could si

6、ng this sono years ago.(改為一般疑問(wèn)句)議。Sams mother feels really tired.Aisha wants to wear a headscarf(頭巾) to school.3Johns friend wants to date() his sister. Qing Yuan needs some extra( 額外的) money.Ken wants to read more books.pocketSu Lins friends think her clothes are out of style.Qing Yuans stereo(音響)

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？(改為同義句) Whats with Jack?12I often argue with my parents.(提出適當(dāng)?shù)慕ㄗh)D They should help her buyclothes.morefashionable15不應(yīng)該嘲笑別人。We others.昨天她怎么啦？What with her yesterday?我可以借你的自行車嗎？your bike?我該怎么辦呀？What I ？13Could you ride a bike when you were four？(作肯定回答).根據(jù)漢語(yǔ)意思完成句子，每空一詞。14你應(yīng)該努力學(xué)習(xí)英語(yǔ)。You at English.單元語(yǔ)法小專題(Grammar Focus).15BEFAC68DHG.9.Whats wrong with10.Could her little daughter sing11.the matter12.I thin