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1、连词and, but and or,Conjunctions and, but and or,祈使句，无主语， 动词原形就可以 表示请求或命令， Lets ,please 表客气 如果变成否定句， Dont加动原是规律,祈使句：祈使句表示请求或命令。 祈使句无主语，谓语动词没有时态和数的变化。 祈使句，动原. Please+动原. 否定:Dont+动原.Lets+动原. 否定：Lets not+动原.,and的用法：,You and I are going there.,I like bananas and pears.,She can sing and swim.,He is tall an
2、d cool.,and的意思是_，表示_关系， 可以连接并列的单词，短语和分句。当有多 个并列的单词或短语时，and要放在最后两 个之间。如果两个分句的主语相同，则第二 个分句的主语可以省略。,“和，并且”,并列,Lets practice:,将下列各句用and连接起来：,1, I am pretty. I am slim._,2, She is good at math . She is good at English._,3, Bob can play soccer. He can play baseball, too._,She is good at math and English.,
3、I am pretty and slim.,Bob can play soccer and baseball.,or的用法：,Do you want to go or stay?,Do you like bananas or pears?,She cant sing or swim.,Is he tall or short?,or的意思是_，表示_关系， 如果两个分句的主语相同，则第二个分句的 主语可以省略。用于否定句或疑问句中连接 并列成分，不用_.,“或，还是”,选择,and,Lets practice:,改错：,1, I am pretty or slim._,2, She isnt g
4、ood at math and English._,3, Can Bob play soccer and baseball?_,She isnt good at math or English.,I am pretty and slim.,Can Bob play soccer or baseball.?,but的用法：,I am short but slim.,She likes bananas , but she doesnt like pears.,She can sing ,but she cant swim.,but的意思是_，表示_关系， 连接两个含义相对或相反的单词，短语或 分句
5、。如果两个分句的主语相同，则第二 个分句的主语可以省略。,“但是”,转折,Lets practice:,( ) 1 My aunt doesnt like cats_ dogs. A. but B. or C. and D. not ( ) 2 Mary _ Lucy told him to come to see us. A. or B. and C. with D. nor ( ) 3 Hurry up, _ well be late for the film. A. and B. but C. so D. or ( ) 4 Be quick, _ well be late. A. and
6、 B. or C. but D. so ( ) 5 We ran to the trees, _ we couldnt see any birds. A. but B. so C. and D. for,B,B,D,B,A,用and, but和or完成句子,We are happy boys _girls.He likes soccer, _ he didnt play it well. Its sunny_ cold.They dont have meat _fish at home. He stayed at home. He watched TV.(合并),and,but,He stayed at home and watched TV.,but,or,Summary,连词口诀,连词and，but还有or，前后一致用and， 前后转折用but， 选择疑问要用or， 否定疑问， and要变or。,Homework,
