"I drink water when I am thirsty."

Translation: Jeg drikker vann når jeg er tørst.

[LangForThought]

It said "da" was acceptable in place of "når", yet I got it wrong.

[Luke_5.1991]

"Da" is not used for repeated actions.

[LangForThought]

Meaning to get thirsty is a repeated action?

[Luke_5.1991]

No, but the sentence presents a repeated habit, which calls for "når."

[LangForThought]

So basically "da" is used mostly for past actions like "I bought this when I went to the store"?

[Luke_5.1991]

Then it's når.

[Luke_5.1991]

Yes.

[LangForThought]

What about the present "when I see you"? or "I'll believe it when I see it"?

[benchch]

why no v2 rule in the second part?