what is the part of speech of this sentence?

Question

8. She is a terrible teacher.
adverb
interjection
verb
adjective

I'm stuck between interjection and adjective?

Answer 1

Sentences are not a part of speech. Only words are parts of speech.

http://www.enchantedlearning.com/grammar/partsofspeech/

Please do not post any more of these questions until you've studied the above site.

Answer 2

the function of the sentence****** ?

Answer 3

It's a declarative sentence.

http://www.infoplease.com/cig/grammar-style/sentence-functions-four-tops.html