Or even in Teachers ' various guide, much angle setting situation that have to use " Ba " cases, foreign students use " to " sentence error rate, withdrawal rate is very high, the correct rate is very low. 或者即使在教师的多方引导,多角度设置情境以至于不得不用把字句的情况下,外国留学生使用把字句的偏误率、回避率还是很高,正确率非常低。