This app was mentioned in 1 comment, with an average of 1.00 upvote
To my experience, the easiest way to deal with the verbs is to use the 6 groups approach. I have compiled all the rules I believe are applicable into an app if this can help. https://play.google.com/store/apps/details?id=fi.finnco.presentandverbgroups The app with the same title is available on iOS