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Uses 2-word utterances

Rapid expansion of understanding of words

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Vocabulary spurt starts

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First word spoken

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Uses gestures such as showing and pointing

Comprehension of words appears

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Change from universal linguist to language-specific listener

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Babbling begins

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Understands first word

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Cooing begins

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Crying

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The appropriate use of language in different contexts

Example:
When Carri interrupted her mother in the middle of a sentence, she was asked to be more pragmatic.

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Units of meaning involved in word formation.

Example:
girl vs girls

girl - a single girl (1 morpheme)

girls - more than 1 girl (2 morphemes)

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The sound system of a language including sounds that are used as well as how they can be combined.

Example:
Sometimes, one of the most difficult things about learning a language is trying to accurately pronounce the phonology.

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The meaning of words and sentences.

Example:
We had weekly vocabulary tests in school to improve our understanding of words' semantics.

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The way words are put together to create acceptable phrases and sentences.

Example:
Samantha has been trying to learn Korean. She has memorized a lot of vocabulary, but is still trying to grasp the syntax so that her sentences can be understood.