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Second Language Acquisition and Second ... - Stephen Krashen

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far more valuable then the exercise itself. We teach language best when we use it<br />

for what it was designed for: communication.<br />

Note<br />

1 Correct use in obligatory occasions means simply that the acquirer supplied the morpheme where it<br />

was required. For example, the underlined portion of this sentence is an obligatory occasion for the<br />

plural morpheme in English:<br />

I have three pencil__.<br />

Analysis of grammatical morphemes in obligatory occasions was begun by Brown (1973). As<br />

indicated in Chapter 4, analysis in obligatory occasions does not give a complete picture of language<br />

acquisition. It does, however, provide valuable information on order of acquisition of grammatical<br />

items.<br />

11

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