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Find the mistake: "I don't like you," Jerry said. "I don't like you either." Mark said.
"I don't like you," Jerry said. "I don't like you either," Mark said. (Comma after either)
Put this into reported speech: "I can't believe you have never been to Oregon," he said to me.
He said he can't believe I have never been to Oregon. OR He said he couldn't believe I had never been to Oregon.
Find the mistake: "I don't think I'll go tonight." Bonnie said, "I'd rather stay home."
"I don't think I'll go tonight," Bonnie said, "I'd rather stay home." (put a comma after the first quotation)
Find the mistake: "Can you tell me what's wrong?", asked the doctor.
"Can you tell me what's wrong?" asked the doctor. (delete the comma)