Unit 1 The lion and the mouse -介词用法和情态动词用法详解及练习介词with的用法及与use, and的转换及练习1. with和and的用法（1）with介词，表示和，后面可接名词或名词的宾格。如：I live with my parents.我和父母住在一起。Little dog, run with me!小狗，和我一起跑吧！（2）and是连词，连接两个并列的单词、短语或句子。如：I like red and black,我喜欢红色和黑色。He likes playing football and watching TV,他喜欢踢足球和看电视。（3）当with表示和某人一起时，可用and进行改写。如：He goes to school with me every day.他每天和我一起上学。He and I go to school every day.他每天和我一起上学。2. with和use的用法（1） with表示使用某种方式。use,表示使用两者可互换。如： Chinese use chopsticks to have meals.中国人使用筷子来吃饭。Chinese have meals with chopsticks.中国人使用筷子来吃饭。I use computer to write stories.我用电脑来写故事。I write stories with the computer.我用电脑来写故事。（2） with是介词，而use是动词。经典例题：1. The mouse made a big hole in the net with his teeth.（用 use 改写）________________________________________________________2. I use the computer to play games.（用 with 改写）________________________________________________________3. I play football with my friends every week.（用 and 改写）________________________________________________________4. People can use the phone to talk with others.（用 with 改写）________________________________________________________5. Su Hai and Liu Tao go shopping on Sundays.（用 with 改写）________________________________________________________6. I read books with my parents in the morning.（用 and 改写）________________________________________________________情态动词can的用法1.表示能力（体力、知识、技能等）.Can you lift up this heavy box?（体力）你能举起这个笨重的盒子吗？Mary can speak three languages.（知识） 玛丽会说三种语言。Can you skate?（技能） 你会溜冰吗？（可用be able to代替）Can只有一般现在时和一般过去式；而be able to则有更多的时态。Ill not be able to come this afternoon.我今天下午不能过来。注：当表示“经过努力才得以做成功某事”时应用be able to,不能用Can。如：He was able to go to the party yesterday evening in spite of the heavy rain.尽管昨晚下着暴雨，他还是来了聚会。2.表示请求和允许。Can I go now? 我现在可以走吗？Yes, you can. / No, you can. 是的，你可以。/ 不，你不行。此时可与may互换。在疑问句中还可用could, might代替，并不是过去式，只是语 气更委婉，不能用于肯定句和答语中。一 Could I come to see you tomorrow? 我明天可以来看你吗？Yes, you can. / No, Im atraid not. 是的.你可以。 不，你不可以。3.表示客观可能性（客观原因形成的能力）。Theyve changed the timetable, so we can go by bus instead.他们换了时间表，因此，我们可以乘公交车代替。This hall can hold 500 people at least. 这个礼堂至少可以容纳 500 人。4.表示推测（惊讶、怀疑、不相信的态度），用于疑问句、否定句和感叹句中。Can this be true? 这个会是真的吗？This cant be done by him. 这不可能是他做的。How can this be true? 这怎么可能成真呢？经典例题一、选择题。()1. Can I go fishing with you, Dad?No, you____. You____ stay at home and do your homework first. A. wont, may B. cant, mustC. shouldnt, ought D. neednt, should()2.Do you know whose dictionary it is?It____ be Li Meis. His name is on it.A. can B.mustC. should D. need()3.I cant stop smoking, doctor. For your health, Im afraid you____. A. can B. cantC. mustD. mustnt()4. Is Mr Brown driving here? Im not sure. He____come by train.A. may B. shallC. needD. must二、用can或could的相关形式填空。1.He____ swim and I____ sing.2.She____ read and draw now, but she____write five years ago.3.Liu Tao____ play basketball when he was a child.4.I____ use the mobile phone until I was fifteen years old.5. What could you do three years ago? We ____ride a bike to school.三、按要求完成句子。1.He can play the piano.否定句：_____________________________________ 一般疑问句：_____________________________________肯定回答：_____________________________________否定回答：_____________________________________ 对划线部分提问_____________________________________ 2.你会弹吉他吗？ 当然了。____you____ ____ guitar? Of course.3.两年前我不会骑自行车。I____ ____ a bike two years____. 4.十年前你会写字吗？不，我不会。____ you____ ten years ago? No, I____. 5.五年前你不会做什么？我不会游泳和画画。What____ you____ five years ago? I____ swim or____. 6.They could speak English twenty years ago.否定句：_____________________________________一般疑问句：_____________________________________肯定回答_____________________________________否定回答_____________________________________对划线部分提问_____________________________________ 答案介词with的用法及与use，and的转换及练习1.The mouse used his teeth to make a big hole in the net.2.I play games with the computer.3.My friends and I play football every week.4.People can talk with others with the phone.5.Su Hai goes shopping with Liu Tao on Sundays.6.My parents and I read books in the morning.情态动词can的练习一、选择题。1.B 2. B 3. C 4. A二、用can或could的相关形式填空1.can, can 2. can, couldnt 3. could 4. could not 5. could三、按要求完成句子。1.He cant play the piano.Can he play the piano? Yes, he can. No, he cantWhat can he do?2.Can, play the3.couldnt ride, ago4.Could, write, couldnt5.couldnt, do, couldnt, draw6.They couldnt speak English twenty years ago.Could they speak English twenty years ago?Yes,they could. / No, they couldnt.What could they do twenty years ago