who???s using my car (??????a friend who is using my car???)???a friend whose car I???m using Relative clauses with when, where and whyWhen can be used as a relative adverb in a relative clause after the word time or other nouns which denote periods of time such as year, day, summer, etc. e.g.:I remember the day when I first met her.Wasn???t that the summer when we took the boys camping?Where can