German Grammar: Strong, Irregular, Mixed Verbs and Modals

The lists do not contain all, but most strong, irregular, mixed verbs, and modals (definitely the important ones). While these lists are not entirely complete, for all practical purposes you may assume that if a verb is not listed it is weak (and their formation is not difficult as there is no vowel change).
All lists contain the same verbs, they are only organized differently. Use whichever you prefer, best use them in conjunction with each other.
There is only a relatively limited number of strong, irregular, mixed verbs, and modals, however, they are used a lot, therefore it is important to know them well.
Many--but not all!--verbs that are strong, irregular, and/or mixed in English are the same in German, often even using the same or a similar pattern of change. (After all, both are Germanic languages). For example: kommen/kam/gekommen - come/came/came.
If a verb describes a basic function (eat, drink, sleep, walk, etc.) it is most likely strong or irregular. This has to do with the history of Germanic languages. Likewise, all new verbs are weak (surfen - sie surfte, etc.).
On the lists, the preterite form is the first/third person singular form. Thus, for mixed verbs and modals, replace the -e with the appropriate conjugation ending.
Verbs with prefixes are not listed as such; look for the stem (e.g., for "bekommen" look under "kommen").
Table and listing specific information is included at the beginning of the respective list; review it.

German Grammar * Review & Exercises