If and Whether, Part 1

interchangeable – adj. capable of being used in place of each other

clause – n. a part of a sentence that has its own subject and verb

candy – n. a sweet snack made with sugar or chocolate

phrase – n. a group of two or more words that usually forms a complete sentence

regardless (of) – adv. without being stopped or affected by something

introduce – v. to bring something into use or operation for the first time