Open the brackets and use the past perfect tense we (see) him before they (make) friends with him i already ( get) home before it (begin) rain there (be) a new painting that (i not see) before captain cook (discover) the island before he (die)

We had seen him before they made friends with him. 
I had already got home before it began raining.
There was a new painting That I had not seen before. 
Captain Cook had discovered the island before he died.