Intermediate grammar exercise: unless, if

English grammar practice exercise, intermediate.

In this exercise you will practise unless and if.

Exercise instructions

Complete each sentence with unless or if.

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Unless means 'except if'.

We use unless to say that there may be an exception and that this exception will change the situation.

We're playing tennis tomorrow unless it rains.
(= We're playing tennis tomorrow. However, one exception could change our plans – rain.)

Don't go there unless he tells you to.
(= Don't go there, except if he tells you to go.)

We use the present tense after unless when referring to the future.

I won’t go to the party unless she invites me.

unless she will invite

We don't use unless in conditional sentences.

We'll cancel tomorrow's tennis match if it rains.

unless it rains