“wann” or “wenn” – Test yourself

What’s teh trick you can use to know whether to use wenn or wann? (also known as Einstein-Check)

I’m not sure when I’ll be there.

I’ll do that when I’m there.

Call me when you’re awake.

Let me know when you have time.

When did you do that?

I know for sure when I’ll be there.

I’ll know for sure when I’m there.

If not now then when.

“What time should I come?”
“Whenever you want.”