Пассив Perfect: результат к моменту

Для результата к моменту используйте been: has been signed, had been signed, will have been signed.

• The forms have been checked. — Формы уже проверили.
• The route will have been approved by May. — К маю маршрут утвердят.

Частая ошибка. Не используйте being для готового результата: have been checked, не have being checked.