How to use "add" in a sentence

I add, too, that all the protection which, consistently with the Constitution and the laws, can be given, will be cheerfully given to all the States when lawfully demanded, for whatever cause - as cheerfully to one section as to another.

I will venture to add that to me the convention mode seems preferable, in that it allows amendments to originate with the people themselves, instead of only permitting them to take or reject propositions originated by others not especially chosen for the purpose, and which might not be precisely such as they would wish to either accept or refuse

Later, after Danny was dead, she'd repressed her feelings because she'd known that Michael had been truly suffering from the loss of his child, and she hadn't wanted to add to his misery

He'll just add on an extra trip for his anniversary

We have to save our knowledge, and add to it

Let's add some carrots and other vegetables

He wanted to add something to the stew, too

Harris said, 'It's all right to add the dead rat