"He is fishing" 是表示 "他正在钓鱼" 的英语表达。
其中 "fishing" 是动词，它来源于古英语 "fiscian"，意思是“钓鱼”。
例句：
My father is fishing in the river right now. (我父亲现在正在河里钓鱼。)
We're going fishing at the lake this weekend. (我们这个周末要去湖里钓鱼。)
He loves fishing, it's his favorite hobby. (他喜欢钓鱼，这是他最喜欢的爱好。)