Have 就近原则是英语语法中的一个重要概念，它指的是在一个句子中，have 要尽可能地与最近的动词搭配。例如，在句子“Tom said he had finished his homework and was going to bed”中，have 就近原则指的是它与 finished 搭配，而不是与 going 搭配。

使用 have 就近原则可以使句子更加清晰明了，避免歧义的产生。如果我们不遵循 have 就近原则，可能会导致句子的意思变得模糊不清。例如，在句子“Sarah told her friend that she had bought a new dress and was going to wear it to the party, but she had forgotten to bring it”中，如果不遵循 have 就近原则，将会产生歧义。如果使用“she had forgotten to bring it”来与 had bought 搭配，那么句子的意思就变成了 Sarah 忘记带新裙子去派对了，而不是忘记买新裙子。

在使用 have 就近原则时，需要注意的是，有时候我们需要用到 have 的不同形式，例如 had、has 等。在这种情况下，我们仍然需要遵循 have 就近原则，将它们与最近的动词搭配。例如，在句子“After she has finished her work, she had lunch”中，应该使用“After she had finished her work”来符合 have 就近原则。

总的来说，have 就近原则是英语语法中的一个重要概念，它可以使句子更加清晰明了，避免歧义的产生。在使用 have 的不同形式时，也需要遵循 have 就近原则，将它们与最近的动词搭配。