Fishing was his favorite hobby.

Meaning: This sentence describes fishing being the boy's favorite hobby.

Choice of Words: Fishing is the activity of trying to catch fish. Was is the past tense of the verb 'to be', which is used to describe something that happened in the past. His means belonging to the boy in the story. Favorite means most liked or preferred. Hobby is an activity that someone does for pleasure or relaxation. So, Fishing was his favorite hobby means fishing was the boy's most liked or preferred activity that he did for pleasure or relaxation.

Alternative Expressions

Related Expressions