could you please explain following:
We use the zero conditional to talk about things in general. Could you explain the difference between a sentence with “when” and “if”? In what situation are they used?
When/If you fly budget airline, you have to pay for your drinks and snacks.
If/When you need more space, a small car is big enough for one person.
When we talk about things in general, we use the Present Simple.
When we are talking about things in general, we use the Present Simple.
Giving a definition, speaking in general, when do we use the Present continuous in the when-clause? Is there a difference? And again can we replace when with if in these cases?