Sentence examples for is are of from inspiring English sources

This demonstrates that the factor(s) responsible for macrophage polarization of macrophages is (are) of protein nature.

I am being of service.

Mecca is being cleansed of Meccans".

She is being ironic, of course.

whatever it is, be proud of it!

It's is up you of course.

That's been part of my problem.

"It's been years of doing nothing.

She's being modest of course.

"Where they are is kind of irrelevant.

It's been one of those years.