He dreamed of becoming a famous artist one day.

Meaning: This sentence describes the boy's aspirations to achieve recognition and success in the field of art.

Choice of Words: Dreamed is the past tense of the verb Dream, which means to have thoughts or images in your mind while sleeping. Becoming is the present participle of the verb Become, which means to change into a different state or condition. Famous means well-known and respected, while Artist refers to a person who creates art.