He seems to be very tired.

The reason he is thought of that way is because he always works seriously.

It is not thought that he can solve the problem.

In my opinion, this plan has a high chance of success.

I'm tired and can't move my arms and legs as I want.

I am thinking of learning Greek.

He has many Greek friends.

He is an expert in mythology and gave a lecture on the gods of ancient Greece.

He has a proud patriotism for his country.

The characters in this story are very attractive.