He suddenly started acting as if he had gone mad.

He always cares about my health.

There are no aspirated consonants in Japanese.

An aspirated consonant is a sound that is pronounced with a strong exhalation.

He is behaving like an idiot.

Please ensure the safety around you when using fire at the camp.

Chlorine detonating gas is very dangerous, and it requires careful handling.

Every morning, I meditate to cleanse my mind.

Three days ago, I went to Tokyo.