One of my missions as an editor is to remove dialogue tags whenever possible. Stop and think about it…if you’re using quotation marks to indicate dialogue, you’re indicating that a person is talking. So…why do you feel the need to add: he said, they answered, she replied? As long as it is easy to tell which character is speaking, a dialogue tag is unnecessary, and you can trim countless wasted words from your story. The action can show who is talking, and a new line of dialogue indicates a different character is speaking.
e.g. “I can’t do that,” she whispered
should be: “I can’t do that.” He could barely hear her.
e.g. “The dog is getting away,” he exclaimed, grabbing a leash and running through the gate.
should be: “The dog is getting away!” He grabbed a leash and ran through the gate in hot pursuit.
Other examples that can clarify when to use dialogue tags can be found at these links: