Some examples of quotation marks used to indicate dialogue would be the following:
Quoted text appearing at the end of a sentence:
Davis said, “I am too sick to go to school today.”
Quoted text appearing at the beginning of a sentence:
“Don’t forget to study for tomorrow’s vocabulary quiz,” Mr. Byron warned.
Quoted text appearing at the beginning of a sentence with a question or exclamation:
“What are you writing your book report about?” Kenton asked.
“I am so excited to go to Niagara Falls!” Sebine shouted.
Quoted text interrupted by narration:
“Be careful!” Tyler exclaimed. “There are Legos on the floor over there.”