It's not appropriate for me to intervene in his problem.

I commute to work every morning by high-speed train.

We are working hard to improve our service.

We are working on the development of new software.

We are developing a new software.

I will attend the meeting tomorrow.

We are scheduled to have an important meeting tomorrow.

She was collecting shells on the beach.

He belongs to the upper class of society.

He belongs to the Japanese navy.