javascript - 匹配 "After"如果它后面没有一个 -ing 词

Question

如果 After 之后(逗号之前)没有 -ing 词，我想匹配它。所以 After 和逗号之间不应该有 -ing 词。

所需的匹配项(粗体):

After sitting down, he began to talk.

After finally sitting down, he began to talk.

After he sat down, he began to talk.

我认为这个正则表达式可以做到这一点:

\bAfter\b.*(?!\w+ing)+,

但如果后面没有 -ing 单词，它也会匹配 After:

After sitting down, he began to talk.

After finally sitting down, he began to talk.

After he sat down, he began to talk.

https://regexr.com/683bv

这是为什么以及如何解决？

Answer 1

试试这个正则表达式

仅匹配 After 中的句子和一个逗号，在 wo 之后没有带有 -ing 的单词

只是 .+ 的惰性量词(而不是正则表达式中的 \w+)就可以了

\bAfter (?!.+?ing).*?,

(在第二个 .* 之后还有一个惰性量词，以防同一个句子中有 2 个逗号)

输出:

Regex101 Demo

告诉我它是否不适合你...