He gave me instruction in cooking techniques.

Understanding the principles of electromagnetism is difficult.

We made a TV commercial to advertise our new product.

We have started advertising our new product.

I commute by intracity tram every day.

He is troubled by tinea versicolor.

We went to the shrine for the festival.

He is majoring in genetics at university.

The children were playing by doing somersaults in the park.

He turned the car over.