The construction worker carefully put the finishing brick piece to complete the building project. OR, in another sense of "put": "He decided to put his answer in the most diplomatic way he could."
An angry bird scratched my arm! "An" is usually put it a sentence to tell you the noun next to it is singular. Usually if the noun starts with a vowel (A, E, I, O, U) you use "an" if not you use "a"....