他的额头布满了汗珠。

His forehead is covered in ___sweat.

天气太热了，我稍微动一下就出汗。

It's so hot that I start ___sweating even with little movement.

为了准备考试，他整个周末都在埋头苦学。

He's been ___sweating over his studies all weekend to prepare for the exam.

别为考试结果焦虑，你已经尽力了。

Don't ___sweat over the exam results; you did your best.