The last, the state of physical being, would be serious enough.

I have always thought he was a sort of human being.

The people see me as a different kind of human being.

For example, the body of a human being is usually 50 to 75 percent water.

You felt that he was only playing the part of a human being.

His hand was on the door of her being, trying to force it open.

In the thinking of a human being, a hundred years is a long time.

I doubt the result would make you think of a human being.

"That he might finally learn the nature of his own being."

And she meant it with every part of her being.