Our auxiliary verbs to be, to be, to have are the translation of the Latin verb sum with the Greek verb eimi. As well, in German also have 3 auxiliary verbs which are werden, haben and sein. Werden means get to be, become, be and de is the third person plural of the preterite imperfect indicative: them, they came to be, were.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list