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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 or pointing. Comprehension of words appears

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change from universal linguistic to language specific listener

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babbling

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understands first word

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cooing begi

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Once a child is born, there first form of communication is crying.

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The system of using appropriate conversion and knowledge of how to effectively use language in context. For example, using manners in appropriate situations

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The system of meaningful units involved in word formation. For example, when a "s" is added to the word girl"s", it changes the meaning of the word.

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The sound system of a language, the study of sound patterns and their meanings. For example, the comparison of 2 different sounds in the phrase "pop-up."

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The system that involves the different meaning of words and sentences. An example would be "some see the glass half empty, where as others see the glass half full," we all know what an actual half empty glass is, but used in this phrase it captures a different meaning.

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Syntax can be defined as the arrangement of words to form a sentence. For example, the sentence "Sebastian pushed the bike," does not mean the same thing as "The bike pushed Sebastian."