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Children vocally responds to stimuli.
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Children begin gesturing as a means of communication.
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First words are normally spoken at this age.
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Children begin to incorporate word-order rules into their speech.
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Toddlers add bound morphemes to their short sentences.
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Sentences become more sophisticated and adult-like.
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Children begin to fit their speech patterns to match their speaking partner.
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The majority of language form is learned by this age.
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Children begin learning how to read and write at this age.
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Fully developed language has formed by this time.