Can you show me the passage, and I'll get a better understanding.
First, I'll say this. <em>Future will mean past the present- look into the future. For something in the future to foreshadow Macbeth, in needs to be a warning or indication, of something in the future. </em>
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<u><em>Read your story again. See if anything I told you matches.</em></u>
Hey there! Hello!
I believe the comma should go here:
<span>"I saw three kids sitting on the porch, across the street."
"Across the street" is a sentence fragment. These are typically separated from the rest of the sentence with a comma. Sentence fragments may seem like sentences, but you couldn't make it it's own sentence, since it doesn't contain a verb. A sentence must have a verb and a subject in order to be considered valid, and in the case of fragments, they're purely there to add more to the current sentence.
I hope this helped you out! Feel free to ask me any additional questions if you have any. :-)</span>