In other places (if I am remembering correctly) the indefinite form used is the plural. Ie, "I can drive cars". Is there a way to know WHICH fixed expressions use the singular and which use the plural?
Ok. I noticed that 'a car' was acceptable and that 'we must use glasses' was acceptable for 'vi må bruke glass', so I thought I'd ask. Is it because 'jeg' refers to one person and 'vi' is more than one, so the item matches that?