用js实现，过滤掉英语句子中的助词，例句：I'll tickle you if you don't wake up.

好的，以下是一个用 JavaScript 实现过滤英文句子中助词的示例代码：

const sentence = "I'll tickle you if you don't wake up.";
const stopwords = ["a", "an", "the", "if", "and", "or", "but", "so", "in", "on", "at", "to", "from", "with", "without", "of", "for", "by", "about", "after", "before", "during", "since", "until", "while", "through", "although", "because", "since", "unless", "whereas", "whether", "while"];

const filteredSentence = sentence.split(" ").filter(word => !stopwords.includes(word.toLowerCase())).join(" ");

console.log(filteredSentence);

上述代码中，我们首先定义了一个英文句子 `sentence` 和一个包含常见助词的数组 `stopwords`。然后，我们对句子进行了分词，使用 `filter` 方法过滤掉了常见助词，并使用 `join` 方法将过滤后的单词重新组合成一个新的句子。最后，我们输出了过滤后的句子。

在上述示例中，我们使用的是一个简单的数组来存储常见助词。如果您需要更全面的助词列表，可以考虑使用第三方的助词词典库。