Hello! I have two questions: 1. Let's say my friend has an interview for a new job. Can I tell him: "I will be rooting for you to get this job"? 2. I was taught that we use "while +subject + verb or while + gerund". However today I came across this example: You unintentionally exchanged your shopping basket with someone else's while in the supermarket. My questions is, would it be correct to use "in the supermarket" after "while"?