He is struggling to understand the perfect tense in English.

I like listening to light music.

He is an expert in neurology.

This device operates using a circular current.

I love Hainanese chicken rice.

He was studying with his nerves on edge the day before the exam.

My biological clock is disrupted, and I've been having sleepless nights.

I use a heart rate monitor during my daily exercise.

He makes a living as a freelance designer.

He wrote an ancient poem using the literary language form.