Past perfect:  affirmative and negative
Complete the text about a farm in Australia. Use the affirmative or negative form of the past perfect. 
In September the raln finally arrived. Before that ... we(have)  three years of dry weather. Day after day the sky ... (be) blue and almost no rain ... (fall). We ... (see) any water in the river for over a year and the fields ... (turn) brown. So when the raln came, we were very relieved. We were lucky that the dry forests ... (catch) fire. Many of our sheep ... (die), but the farm ... (survive).