并列复合句例句

1.I ask him when we'll go to the zoo,but he doesn't know.

3.The man who is standing under the tree is very poor,but he is very helpful.

4.He likes math,and he often help others Who are weak in it.

6.He doesn't know when they will have the meeting,so he call up his friend.

能满意吗？祝你进步。