What three phrases are repeated in JFK's inaugural speech

On Friday, January 20, 1961, John F. Kennedy delivered his inaugural address as President of the U.S.A.  One of the rhetorical devices that Kennedy used in his speech was anaphora; that is, he repeated certain phrases at the beginning of sentences.  Below are three of the phrases that he repeated, with some examples.

1) "We pledge":

This much we pledge—and more

we pledge the loyalty of faithful friends.

we pledge our word that one form of colonial control shall not have passed away merely to be replaced by a far more iron tyranny.

To those peoples in the huts and villages across the globe struggling to break the bonds of mass misery, we pledge our best efforts to help them help themselves

2) "Let both sides":

Let both sides explore what problems unite us instead of belaboring those problems which divide us.

 Let both sides seek to invoke the wonders of science instead of its terrors.

3) "Ask not":

ask not what your country can do for you—ask what you can do for your country.

ask not what America will do for you, but what together we can do for the freedom of man.