Zero Conditional

When we want to talk about things that are always or generally true, we can use

If/When/Unless plus a present form PLUS present simple or imperative.

Notice that we are talking about something which is generally true, not a specific event.

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

Notice that 'unless' means the same as 'if not'.



exercise 1

exercise 2

exercise 3

exercise 4

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