so he is finding this trip very exciting为什么用现在进行时呢

so he is finding this trip very exciting为什么用现在进行时呢
My brother has never been abroad before,so he is finding this trip very exciting.find 觉得的意思,为什么使用现在进行时呢,是新概念中的句子,大家联系上下文帮我分析一下好吗
激动人心的旅行
I have just received a letter from my brother,Tim.He is in Australia.He has been there for six months.Tim is an engineer.He is working for a big firm and he has already visited a great number of different places in Australia.He has just bought an Australian car and has gone to Alice Springs,a small town in the centre of Australia.He will soon visit Darwin From there,he will fly to Perth.My brother has never been abroad before,so he is finding this trip very exciting.