Recognize and write question sentences, ending them with a question mark instead of a period.
Some sentences ask something instead of telling something. These are questions, and they end with a different mark: a question mark (?).
A telling sentence says "The dog is big." A question sentence asks "Is the dog big?" Same idea, different ending, different job.
Mastery looks like: They write question sentences correctly, ending with a question mark, and can tell a question apart from a telling sentence.
Common stumbles: Ending a question with a period out of habit; writing a telling sentence but adding a question mark by mistake; forgetting the question word at the start.
See it visually
Interactive, spoken-aloud tools that show this idea in motion.