He has psychopathy, making it difficult for him to understand social rules.

He is known as an expert in psychoanalysis.

My brother works as a psychiatrist.

I find my new fountain pen easy to write with, and I really like it.

He continues to practice in search of complete enlightenment.

I have been studying Japanese for three months.

Sanichi is my best friend.

In response to her help, he said 'Thank you'.

He drew a triangle on the blackboard.

He prefers to speak in the third person.