I have installed a new computer.

He is acting very arrogantly.

We hold weekly meetings to deepen our mutual understanding.

That was unexpected, I had no idea you were good at cooking.

This lake is rich in diatoms.

He found a gem in the shape of a dipyramid.

He made an object in the shape of a bicone.

The sunlight poured into the room, making it very bright.

Nikko is my best friend.

His name is used as part of the genitive case.