He worked diligently to finish the project.

Meaning: He put in a lot of effort and paid attention to complete the task.

Choice of Words: Worked is a verb that means to do something that requires effort or exertion. Diligently is an adverb that means with care and attention. Finish is a verb that means to bring something to an end. Project is a noun that means a planned undertaking or piece of work.

Alternative Expressions

Related Expressions