The English language has many punctuation rules and they can be confusing at times. One of the hardest punctuation types to learn is how and when to use a question mark correctly. Punctuation is a symbol that comes at the end of a sentence and helps the reader determine the context of what is being said.
Anytime you are asking a direct question you should end the sentence with a question mark instead of a period. A direct question is pretty straight forward.
Do you like apples?
Do not use a question mark if the question is indirect, meaning the sentence contains both a statement and a question. In this case you would end with a period. In the example below a statement is being made about a question, therefor the period is used.
I wonder if he would like apple pie.
If a sentence is half statement and half question, separated by a comma, then you would use the questions mark at the end. In the example below you are making a statement followed by a question.
You do have an apple, don’t you?
Finally, if you are making a statement or demand in the form of a question but not actually expecting an answer, this is called a rhetorical question. Although they sound like questions, because you don’t want or require an answer, they are treated like normal sentences with a period at the end or an exclamation point.
Would you stop that already!