Common wild oat is growing in this field.

Common wild oat is growing in my garden.

I like eating buckwheat.

He drew fine lines using a ruling pen.

Corvus is one of the constellations in the southern hemisphere.

This squid's beak is very big, isn't it?

Do you understand the necessity of this project?

That information is unnecessary.

That information is completely unnecessary.

He thinks that war is a necessary evil.