First conditional

First conditional

Possible future

First conditional

Present simple

Future simple

If we don't take care of our planet, the ice caps will melt.

First conditional

Present simple

Future simple

Verb

Present simple

If

will / will not

won't

If we don't take care of our planet, the ice caps will melt.

Result

Condition

If

We use won't for negative sentences.

If we waste electricity, we won't help the environment.

If we keep cutting down the trees, we won't stop global warming.

The if clause can come either first or second in the sentence.

Condition

Result

IF CLAUSE

MAIN CLAUSE

We won't save the environment if we waste electricity.

Will/Won't can be replaced by modal verbs such as should/might/can.

Result

Condition

If we don't take care of our planet, the ice caps will melt.

If we don't take care of our planet, the ice caps might melt.

If we take shorter showers, we will save water.

If we take shorter showers, we can save water.

If we stop using disposable plastics, we should reduce sea and water contamination.

POSSIBLE FUTURES

Let's see if you understand. If you undestand you won't make any mistakes.

1. If I __________ (go) out tonight, I ___________(go) to the cinema. 2. If you _______ (get) back late, I _______(be) angry. 3. She _________ (cook) dinner if you _________ (go) to the supermarket.