- Câu điều kiện

 + If it doesn't rain tomorrow, we will go to the zoo (loại 1)

 + If we put the ice outside, it melts (loại 0)

 + If I were you, I wouldn't throw the trash away (loại 2)

 + If there were not gravity, we couldn't live (loại 2)

 + If we hadn't met him yesterday, we wouldn't have known his job (loại 3)

 - Mệnh đề kết quả

 + The sun was shining, so we went to the zoo

 + I was sick, so I couldn't go to school

 + He is lazy, so I won't help him

 + The movie was boring, so I slept from the beginning to the end

 + I don't know the answer, so I can't help you