III. Make the sentences interrogative and negative (where possible). 1. He had left a lot of money for his family before he died. 2. She had
studied privately before she went to university. 3. They had built up about 80
companies by the end of the century. 4. She will have improved her French by
the next term. 5. They will have taken all their exams by the time the summer
begins. 6. He will have returned to Sweden by that time.​