How to use "nod" in a sentence

She seems to nod, and he stands up and goes to the door

The men stand and nod politely, and Carolina is amused by the interested looks they give Eleanor Chance.

After only two weeks of working with Smith, he already knows that it is best to just nod.

It's best to just nod

Yes, it's best to just nod.

They would nod and smile woodenly and agree that it was a strange and frightening experience, but all the while, they would be thinking that poor old Vivienne was finally getting senile