Question

We didn't know his address утворіть питальну форму і стверджувальну

Answer 1

- We didn't know his address

? Did we know his address? No, we didn't

+ We knew his address

Answer 2

Sure, here are the affirmative and interrogative forms of the sentence:

Affirmative: "We didn't know his address."

Interrogative: "Did we know his address?"