I have a severe headache and can't concentrate on my work.

I had a severe headache, so I took a pill.

I thought his behavior was really cruel.

Aldehyde is a very important compound in organic chemistry.

I think his behavior is unjust.

I think his actions are completely inhumane.

It seems like he has been poisoned by something.

He was poisoned after eating something.

Whenever I catch a cold, I always take this pill.

I drink coffee every morning.