連詞and, but and or

1、連詞連詞and, but and orand, but and orConjunctions and, but and orConjunctions and, but and or祈使句，無主語，動詞原形就可以表示請求或命令，Lets ,please 表客氣如果變成否定句，Dont加動原是規(guī)律 祈使句：祈使句表示請求或命令。 祈使句無主語，謂語動詞沒有時態(tài)和數(shù)的變化。 祈使句，動原. Please+動原. 否定:Dont+動原. Lets+動原. 否定：Lets not+動原.and的用法：You and I are going there. I like bananas and pears.

2、 She can sing and swim. He is tall and cool. and的意思是_，表示_關(guān)系，可以連接并列的單詞，短語和分句。當有多個并列的單詞或短語時，and要放在最后兩個之間。如果兩個分句的主語相同，則第二個分句的主語可以省略?！昂?，并且”并列Lets practice:將下列各句用and連接起來：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 i

3、s good at math and English.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_關(guān)系，如果兩個分句的主語相同，則第二個分句的主語可以省略。用于否定句或疑問句中連接并列成分，不用_.“或，還是”選擇andLets practice:改錯：1, I am pretty or slim.

4、 _2, She isnt good 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_關(guān)系，連接兩個含義相對或相反的單

5、詞，短語或分句。如果兩個分句的主語相同，則第二個分句的主語可以省略。“但是”轉(zhuǎn)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. a

6、nd B. or C. but D. so ( ) 5 We ran to the trees, _ we couldnt see any birds. A. but B. so C. and D. forBBDBA用用and, but和和or完成句子完成句子1. We are happy boys _girls.2. He likes soccer, _ he didnt play it well.3. Its sunny_ cold.4. They dont have meat _fish at home. 5. He stayed at home. He watched TV.(合并)andbutHe stay