I lately lost a preposition.
It hid, I thought, beneath my chair.
And angrily I cried, “Perdition!”
Up from out of in under there.
Correctness is my vade mecum,
And dangling phrases I abhor,
But yet I wondered, “What should he come
Up from out of in under there for?”
One of my favourite poems, which illustrates nicely that there is no reason at all why English cannot end a sentence with a preposition. Many, many prepositions, in fact.