I always say taken when using another verb (insert a technical grammar name here, probably a participle or something) Took stands on its own. For example: I hav

I always say taken when using another verb (insert a technical grammar name here, probably a participle or something) Took stands on its own. For example: I have taken the test and Bob took the test Thursday. It could also have something to do with regional dialects, I'm not entirely certain.