Were you taught that a preposition should never be placed at the end of a sentence? Ending a sentence with a preposition is a perfectly natural part of the structure of modern English. For example:
- in some passive expressions:
- The dress had not even been paid for.
- The match was rained off.
- in relative clauses and questions that include verbs with linked adverbs or prepositions:
- What did you put that there for?