I have a question that confuses my mind. I've come across this text:
"You have eight hours in which to complete this exam."
The point which I didn't understand is the meaning of "which to ...". Because "which" is a relative clause. And relative clauses contain subject and verb. Here is the definition of clause:
A clause “a group of words containing a subject and predicate and functioning as a member of a complex or compound sentence" (Merriam-Webster).
Okay so, normally after relative words there should be a clause which includes subject and verb like in this example: "This is the stone against which he leaned." But in mine, interestingly there is no complete clause. There is just an infinitive verb.
Could you please explain the reason why there is not a complete sentence after "which"?
Edit: To make myself more clear I changed and shorten the question.