заплатила

заплатила

"Paid" (past tense, feminine singular).

This sentence uses 'заплатила' as a past tense verb, referring to a completed action of paying for something.

Она заплатила за билет.

She paid for the ticket.

Here, 'заплатила' is in a dependent clause introduced by 'если', questioning whether the action of paying happened.

Я не помню, заплатила ли она за это.

I don't remember if she paid for it.

In this conditional sentence, 'заплатила' is used in subjunctive mood with 'если бы' to express a hypothetical action.

Если бы она заплатила вовремя, то не было бы штрафа.

If she had paid on time, there would not have been a penalty.