越南留学生“了”字句习得的偏误

An Error Analysis of the Vietnamese Students’ Learning "了" Sentence

偏误分析要考虑不同的学习对象,学习对象不同,表现出来的偏误也不太一样。越南留学生＂了＂字句习得有遗漏偏误和误加偏误两类,习得的情况为：（1）初级阶段对＂了2＂的掌握比＂了1＂要好;（2）中级阶段是最模糊的阶段;（3）中级阶段以后,后期的偏误主要出现在＂了1＂上。母语的迁移是其中主要的原因。

Because different learners will commit different errors, the focus of error analysis varies with different learners and situations. Vietnamese students usually commit two kinds of errors in learning ＂了＂ sentence, one being omission error and the other redundant. At the initial stage, they can acquire ＂了2＂ better than ＂了1 ＂. At the intermediate level, they still have doubts about the both. At a more advanced level, most errors are found in their use of ＂了1＂, whose cause is related to the negative transfer of their mother tongue.