He was walking along the coastline.

The shape of this object is very unique.

Please follow this line.

His attitude suddenly changed.

The coastline has changed shape due to years of erosion.

The coastline is gradually changing its shape due to the erosion by waves.

He has been working as a doctor in this town for many years.

I haven't seen him for a long time.

He has been working as a doctor in this town for many years.

We went to the coast with our family on the weekend.