Before we get any further with pronouns, let's cover what the difference between a subject and an object pronoun is, because the distinction between those two concepts will start coming up a good deal.
Practice this yourself on Khan Academy right now: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/e/pronoun-case?utm_source=YT&utm_medium=Desc&utm_campaign=grammar
Watch the next lesson: https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/grammatical-person-and-pronouns-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar
Missed the previous lesson? https://www.khanacademy.org/humanities/grammar/partsofspeech/the-pronoun/v/who-versus-whom-the-parts-of-speech-grammar?utm_source=YT&utm_medium=Desc&utm_campaign=grammar
Grammar on Khan Academy: Grammar is the collection of rules and conventions that make languages go. This section is about Standard American English, but there's something here for everyone.
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