I think your basic theory is wrong. ✬

Air, like food, is a basic human need. ✬

The family is the basic unit of society. ✬

Mathematics is basic to all sciences. ✬

The rooms in this hotel are pretty basic. ✬

I finally understand the basic principles of calculus. ✬

This is basic. ✬

Tom easily learned the basic rules of the game. ✬

It's one of the basic human instincts. ✬

This is one of the basic rules. ✬