ZERO CONDITIONAL

Zero conditional When we talk about things that are generally or always true, we can use: If/When/Unless plus a present form PLUS present simple or imperative • If he gets there before me, ask him to wait. • When you fly budget airline, you have to pay for... More

Zero conditional
When we talk about things that are generally or always true, we can use:
If/When/Unless plus a present form PLUS present simple or imperative
• If he gets there before me, ask him to wait.

• When you fly budget airline, you have to pay for your drinks and snacks.

• Unless you need more space, a small car is big enough for one person.

Note that we are not talking about a specific event but something which is
generally true.

In the condition clause, we can use a variety of present forms.
In the result clause,
there can only be the present simple or imperative.

• If you visit London, go on the London Eye.

• If unemployment is rising, people tend to stay in their present jobs.

• If you ve done that, go and have a coffee.

• When you go on holiday, take plenty of sun cream.
It ll be very hot.

• When I m concentrating, please don t make so much noise.

• When I ve finished an article, I always ask Kate to read it through.

Notice that unless means the same as if Less