Перепишите следующие предложения и переведите их на язык. определите в предложениях видо-временную форму и залог глагола-сказуемого: 1. the letters have already been signed. 2. the goods had been delivered by the 15th of july. 3. the in¬vitations to the party will have been sent by saturday. 4. the world trade organisation was formed in 1994 to promote free trade.

1. The letters have already been signed. - Present Perfect Passive - Письма уже подписаны. 
2. The goods had been delivered by the 15th of July. - Past Perfect Passive -Товар был доставлен к 15 июля. 
3. The invitations to the party will have been sent by Saturday. - Future Perfect Passive - Приглашения на вечеринку были отправлены к субботе. 
4. The World Trade Organisation was formed in 1994 to promote free trade. - Past Simple Passive -Всемирная торговая организация была создана в 1994 г. с целью содействия свободной торговле.