1. Ade killed the stubborn goat. "Ade" here is a noun which names a person while "killed" is the verb, "stubborn" is an adjective which qualifies the "goat" which is another noun.
2. She said she left the key on the kitchen slab while going to the shop. "She" is a pronoun, "on" and "to" are prepositions show relationship between words.
3. Oh! That was a mistake! the young woman exclaimed. Wow! That was a brilliant presentation, the host said to his guest. Here we have exclamation "oh!" and Wow!
4. Ahmad and Ismail are best of friends. They "genuinely" love and care for eachother. genuinely is an adverb while "and" is a conjunction .