高中短文改错

题目

高中短文改错
(1)This afternoon Li Hua was seated under a big tree,looked
(2)unhappy.I went up to ask that made him so unhappy.He
(3)tlod me that a classmate of his troubled him a lots.Sometimes
(4) when Li Hua was listening to attentively in class,the classmate(5)patted him on the shoulder,that annoyed Li Hua.He talked about
(6)it with the classmate,but it didn't work.Not know how to slove
(7)the problem,he was wondering whether he should tell the
(8)teacher about it.I suggested that he turned to the teacher for help.(9)but he was afraid that if he did so,the classmates would hate(10)him.It's not easy to get along with others,isn't it?
我只问第（1）个和第（6）个,要求详细的解答,谢谢

答案

第一句中look是系动词(及物动词）,李华看起来高兴即“李华”与“看''之间为主动发出的关系,故应用ing形式,将looked改为looking.
同样第六句应将know改为knowing