The two-word stage is the period in a child's life, usually around 18-24 months old, when they start to use two-word sentences to communicate.
The two-word stage is like using Twitter with a very strict character limit. You have to get your point across quickly and efficiently, so you only use the most important words!
Morpheme: The smallest grammatical unit in a language that carries meaning. For example, 'un-' in 'unhappy'.
Syntax: The arrangement of words and phrases to create well-formed sentences in a language.
Overgeneralization: This occurs when grammar rules are incorrectly generalized to irregular cases where they do not apply. For instance, saying "runned" instead of "ran".
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