Ending a Sentence with a Preposition

It’s a common refrain: “Never end a sentence with a preposition!” In conversation and informal writing, ending a sentence with a preposition is perfectly acceptable. It’s only in formal writing that we still follow the rule.

Which box should this go into?

Into which box should this go?

Come in.

Come into the house.

When I glanced at the table, I saw the dog was hiding beneath.

When I glanced at the table, I saw the dog was hiding beneath it.

The things I have to put up with….

The preposition at the end of this sentence is alright because the phrase put up with is an informal phrase which we wouldn’t use in formal writing.