1. If there isn't a bus we'll have to get a taxi.
2. I'll go for a walk tomorrow if it doesn't rain.
1. Perhaps I'll go to Athens in September. If I do, I'll go and see the Acropolis.
2. We'll have dinner when the food is ready.
3. We'll go to the beach tomorrow if the weather is fine.
4. I'm going to London next week. I'll go and see Big Ben when I'm there.