1. This means you will start dinner before eight and finish after eight
2. You will finish dinner at nine
3. You will do the woek before Friday
4. We often use the preposition ‘by’ with the future perfect
5. I’ll have fixed it by Friday
6. I’ll have marked them by then
7. This time tomorrow I’ll be sunbathing on the beach.
8. I’ll tell you the answer
9. we’ll be sitting in the garden
10. I’ll have woeked here for thirty years