"John is a U. S. citizen because he is native born. We all know that usually native born Americans are U. S. citizens because of U. S. law and the Constitution unless, of course, they renounce their citizenship." Which part of the above paragraph is the qualifier?

The second part or sentence of the paragraph is a qualifier."We all know that usually native born Americans are U.S. citizens because of U.S. law and the Constitution unless, of course, they renounce their citizenship."

Explanation: Qualifiers are necessary when you need to show evidence or what you claim is open to doubt and needs prove. With qualifiers the word or phrase shows how certain or absolute generalized statements can be. The second sentence makes a generalization and its not certain however backs it up by adding the constitution which is a legal document in its statement to back it up.

We all know that usually native born Americans are

Explanation:

A qualifier is considered a phrase or word that limits or enhances how absolute or generalized that a sentence is. The main purposes of qualifiers is to intensify or in most instances, qualify an adverb or adjective. In the sentence above, the qualifier is in the sentences identified because the word "usually", tends to limit the absoluteness of the generalization that native born Americans are U.S. citizens.

often a noun phrase is just a noun or a pronoun:

people like to have money.

i am tired.

it is getting late.

what he !