"Study hard"可以用於多種場合，鼓勵他人或自己努力學習。例如：
"Study hard, and you'll pass the exam."
"I study hard so that I may not fail in the examinations."
"Make them study hard."
"We must study hard."
"You should study hard."
"He's studying hard at English."
"If you study hard, you'll soon pull up your French."
"It is important for us to study hard in our school days."
"The teacher as well as the students expected to study hard."
這些句子展示了"study hard"在不同語境中的套用，既可以用於自我激勵，也可以用於鼓勵他人。