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Infants are especially responsive to voices and faces.
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During the first year, an infant learns the sound patterns and has a better understanding of words, word production, and phrases.
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By the second year vocabulary growths, vocabulary should be about 150 to 300 words.
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At the age of 3 and 4 words start to mushroom out to 900 and 1,500. Words are learned quickly through a process called fast mapping.
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At five-year-old adult like language forms, but some subtle syntactic structures are missing.
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This is where the child starts to sound out words, learns to identify words, and understands their meaning.
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Use words appropriately in conversation with understanding some figurative language.
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11-13 year olds demonstrate an increased ability to look beyond literal interpretations and understand the metaphoric uses of language
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Demonstrates command of the conventions of standard grammar and usage when speaking or writing
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By twelve grade all knowledge of words and understanding should be understood
