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.