I've read a thread about Prepositions in Questions in this forum.
Now I have some questions:
The given example was:
What is a pen (used) for?
The question was:
"I would like to know when I am supposed to do this, why and how?"
The given explanation was:
"If a word like for comes after the word it modifies, it's part of that word, and so it doesn't move unless the word it modifies also moves.
For doesn't move with what because for does not modify what. It modifies used. Used for is a set phrase.
For is a particle not a preposition."
Everything is well explained so far, but I can't find any examples where the opposite is right, means prepositions which modifie nouns or which are not particles of a verb.
Can you please give me some examples for this, because the most easiest rule (and I'm unsure whether it's right or not) which I created out of this is "the preposition stays always with the verb and at the end of the sentence/question."
I am not quite sure that I fully understand your question, but I'll attempt a response. You can post follow-up questions if you have them.
1. This pen is used for signing important contracts.
2. This pen is for signing important contracts.
Questions that could be asked about the pen if we did not know the information above:
1. For what is this pen used? - very formal, and rather old fashioned.
aaWhat is this pen used for? - normal, natural.
2. For what is this pen? - Unnatural. Not acceptable English.
aaWhat is this pen for? - normal, natural.