WHETHER +ING - WHEN +TO
I have two questions tonight.
1)Can you think of any example in which the ING form follows the word "whether"?
2) Is the grammar structure in the following examples common? if so, in which country?
- Have you decided when to have the barbecue?
- He didn't tell me when to be back at the store.
- I wasn't sure who to ask for advice.
Thanks!