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

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.

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

exercise 1

exercise 2

exercise 3

exercise 4

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