The boy played all day.
Meaning: This means the boy engaged in an activity for enjoyment or recreation for the entire day.
Choice of Words: Played is the past tense of the verb play, which means to engage in an activity for enjoyment or recreation. All day means the entire day. When you put them together, "The boy played all day" means the boy engaged in an activity for enjoyment or recreation for the entire day.
Alternative Expressions
Related Expressions