I would recommend sending your teacher an email asking her about it that way you can figure it out soon. But if she says no just practice practice practice. practice with your family or friends or just in your room alone. whatever makes you comfortable. I get really nervous with presentations too but i find that when i practice what i’m saying and get prepared a lot it really helps. hope this helps.
Answer: The word "they" is a: "pronoun" .
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Specifically, "third person, plural" .
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His chubby legs pumping .
I honestly hope this helps you, I put it inside a word document.