1. If there isn't /won't be a bus we have to/we'll have to get a taxi.
2.I go / I'll go for a walk tomorrow if it doesn't rain / won't rain.

Complete these sentences with if or when.

1.Perhaps I'll go to Athens in September. ......... I do , I'll go and see the Acropolis.
2.We'll have diner ........ the food is ready.
3.We'll go to the beach tomorrow ....... the weather is fine.
4.I'm going to London next week.I'll go and see Big Ben ......... I'm there.