An adjective clause tells something about the noun or pronoun in the sentence. It provides some of the required information which is essential for the sentence. An adjective clause begins with relative pronouns or relative adverbs. They provide additional information. A subject and a verb is a part of an adjective clause. In the above sentence, 'that is mailed today' is the adjective clause.
I would look up a quizlet for the stuff you are learning. It really helped me with Apex English 10 semester 1 and semester 2.
Explanation:
People post quizlets with answers for some of the quizzes and test, as well as explain the information and give tips on how to remember it. Quizlet itself allows you to study the content so it is a great study tool whether your teacher actually teaches the stuff or not. I hope this helped, I apologize if it didnt.
(I'll see what quizlets I can find for you and post them as comments on this answer)
