“省得”与“免得”并非在任何情况下都表示目的关系。二者所在句前后为有意致使时表示目的关系;而前后为无意致使时不表示目的关系。“省得”、“免得”表示目的关系时,与“以免”在语体、语义、句法等方面存在着一定的差异。“省得”与“免得”除了方言色彩的区别之外,在意义上也存在区别。 “Saving ” and “Leaving ” are not intended to indicate the purpose of the relationship under any circumstances. The sentence before and after the two are intended to indicate the purpose of the relationship; and when the intention is not intended to cause does not mean the purpose of the relationship. “Save ”, “lest ” indicate the purpose of the relationship, and “lest ” there are some differences in style, semantics, syntax and so on. In addition to the difference between the dialectal color, there are also differences in meaning.