To know things versus to be known things [closed]
We have to know such things
We have to be known such things
The first line is correct. The second line is incorrect and doesn't make any sense. To my knowledge, be known is used almost exclusively in the sense that something is being made aware to people. For example, I only know the use of be known in the following two cases:
1) "Let it be known that as of this day, everybody will be getting a raise in their wages!
2) "It will be known."
or anything similar to those two circumstances. On the other hand, to know is literally the verb know. "I have to know" is in the present tense and just means that you must know something. You can look up the verb tense conjugations online if you need help with conjugation.