这句英语有语病吗

是不是想说：“我坐在电脑前面，心情很糟糕，但却对一个心情很不好的朋友说，你应该振作起来。”我觉得第一句“Sit in front of the computer, feeling depressed,but say to the perdon who is also in a bad mood that he should be happy when chatting on the internet.”缺乏主语，虽说有可能是祈使句，但祈使句一般是在命令、请求或劝告的语境下。但是第二句“I sit in front of the computer, feeling depressed, but say to a friend who is also in a bad mood that he should be happy when I am chatting with him on the internet. ”“say”这个词一般是I say that……所以可以改成“I talk to a friend and say that he should be happy when chatting with me on the internet.”或者把say改成tell

改之前是有语病的，改后还是有。but是连词，前后连接两句完整的句子，而改后but后面的句子没有主语。可以改成下面这样：[Dispressedly sitting in front of computer],I tell a friend (who is also in bad mood) that{ he should be happy when chatting with me on internet}.

person是错的

有语病，是run-on sentence，没有结构。应该这样写：
I sit in front of the computer, feeling depressed. However, when chatting with a friend, who was in the same bad mood, on the Internet, I told him to be happy.

person

把but改为and