He told me the secret.

Nonetheless, he is still a beginner.

On a cold winter night, a kerosene heater is indispensable.

He is known as an oil baron.

He is an expert in petrochemistry.

He is always the type of person who says this when that is said.

It's hard to say, but I think you're wrong.

He always used to say, 'It's easy to say, but hard to do.'

He is good at expressing his feelings well.

I acted just as he said.