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Errors and mistakes are by-products of language learning. They are inevitable, but a necessary part of learning a language. Errors and mistakes comprise a significant portion of a learner's language performance, and provide important insights into the processes of second language acquisition and instruction. They indicate that learning activity is taking place in the learner, and also show us that the learner is on his or her way toward target language proficiency. To some extent, it is errors and mistakes that pave the way for a language learner towards target language proficiency.

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