Уже стоя у кассы, она вдруг вспомни

Уже стоя у кассы, она вдруг вспомнила, что забыла купить молока, и пошла назад к прилавку с молочными продуктами.

Результаты (английский) 1:

Already standing at the cash register, she suddenly remembered that I forgot to buy milk, and went back to the counter with dairy products.

Результаты (английский) 2:

Already standing at the cash register, she suddenly remembered that she had forgotten to buy milk, and went back to the counter with dairy products.

Результаты (английский) 3:

already standing at the register, she suddenly remembered that i forgot to buy some milk, and went back to the counter with dairy products.