Укажите связь главных и придаточных предложений (союзная либо бессоюзная). Предложения

Укажите связь основных и придаточных предложений (союзная либо
бессоюзная). Предложения переведите.

1. If the weather is fine, we can go to the country.
2. We didnt know when the new Metro station would be opened.
3. They were sure they had repeated all necessary material.
4. He said he would work at his diploma work next year.