2. Writing

3. 连词 连词

4. I turned on the TV. I watched it.  I turned on the TV and watched it. I bought my sister a present. She didn’t like it.  I bought my sister a present,but she didn’t like it. 表并列， 递进 表转折

5. He was ill yesterday. He was absent from class. He was ill yesterday. He was absent from class. He was ill yesterday, so he was absent from class. He was ill yesterday, so he was absent from class. 表示结果

6. He was punished by his father. He was punished by his father. He didn ’ t finish his homework on time. He didn ’ t finish his homework on time. He was punished by his father,for he didn ’ t finish his homework on time. He was punished by his father,for he didn ’ t finish his homework on time. 表原因

7. We must hurry up. We can ’ t get to the station on time. We must hurry up. We can ’ t get to the station on time. We must hurry up, or we can ’ t get to the station on time. We must hurry up, or we can ’ t get to the station on time. 表否则或 不然

8. 副词 副词

9. We must hurry up. We can ’ t get to the station on time. We must hurry up. We can ’ t get to the station on time. We must hurry up ;otherwise,we can ’ t get to the station on time. We must hurry up ;otherwise,we can ’ t get to the station on time. 表否则 或不然

10. He had told me the news. I forgot it. He had told me the news. I forgot it. He had told me the news ;however, I forgot it. He had told me the news ;however, I forgot it. 表转折

11. He studied hard. He won the first in the class. He studied hard. He won the first in the class. He studied hard ; therefore, he won the first in the class. He studied hard ; therefore, he won the first in the class. 表因 …… 而产生 的结果， 所以， 因此

12. He finished the reading. He did the listening. He finished the reading. He did the listening. He finished the reading and then he did the listening. He finished the reading and then he did the listening. 表示紧接发生的 行为， 然后

13. 注：在英语中把两个分句合并一句 时，不可单单使用一个逗号连接， 必须在逗号后使用 and, but, or 等并列连词，或者在分号后面加上 however, therefore, then 等这 类副词。 注：在英语中把两个分句合并一句 时，不可单单使用一个逗号连接， 必须在逗号后使用 and, but, or 等并列连词，或者在分号后面加上 however, therefore, then 等这 类副词。

14. 常用并列连词 coordinating conjunctions 平行并列连词 : 平行并列连词 : 转折并列连词： 转折并列连词： 因果并列连词 : 因果并列连词 : 选择并列连词 : 选择并列连词 : and,both…and, not only… but also, neither…nor but, while, for,so or,either…or

15. 请用合适的 并列连词 把每组句子 合并为一个并列句。 1.He was tired. He went to bed. 2.The child hid behind his mother's skirt. He was afraid of the dog. He was tired, so he went to bed. The child hid behind his mother's skirt,for he was afraid of the dog.

16. He made a promise.He didn’t keep it. He made a promise,but He didn’t keep it. Mary is opening the door. John is greeting her guests. Mary is opening the door,and John is greeting her guests.