First Conditional: common communicative uses

In an ordinary future condition, use the Present Simple after if even though the meaning refers to the future: If Maya calls means if she calls at some future time. In the typical result clause, use will and the base form of the verb.

The clauses can change order. When the if-clause comes first, it is usually followed by a comma in writing; when it comes second, a comma is usually unnecessary.

This is the basic pattern for the exercises in this lesson. English also allows can, may, might, an imperative and other forms in the main clause; these change the nuance. Will sometimes appears after if to express willingness or in special constructions, so ‘never put will after if’ would be too broad a rule.

In a prediction, the speaker links a possible event to an expected consequence: the weather changes, so the flight is delayed. The speaker does not necessarily control the consequence.

In a conditional plan, people decide in advance what they will do if a situation develops in a particular way. It is often a backup option: if the place is full, they will meet somewhere else.

Words such as tomorrow, tonight and this weekend help establish a particular future time frame, but meaning remains decisive, rather than any single signal word.

In a promise, the speaker makes a commitment: if the condition is met, they will perform the stated action. The result clause usually contains I’ll or we’ll.

In an offer, the speaker voluntarily offers help or a service if the relevant condition is met. Context shows whether this is an actual offer of help rather than a prediction of someone else’s behaviour.

The distinction between a promise and an offer sometimes depends on the situation. There is no need to invent a single label without context: recognising a personal commitment or willingness to help matters more.

A warning describes an unwanted consequence so that someone can avoid it. The consequence often arises naturally or is outside the speaker’s control: a slippery floor can cause a fall.

In a threat, the speaker presents a negative consequence under their control as a way to make another person do or avoid doing something. The grammatical structure is the same, so its function cannot always be identified reliably without context.

Setting a firm boundary is not necessarily a threat in the broader ethical sense. In these exercises, consider the particular intention, control over the consequence, and the benefit or harm to the listener.

The Zero Conditional describes a general pattern or repeated habit: If ice gets warm, it melts. The First Conditional shifts attention to a particular possible future situation: If the ice gets warm in the car, it will melt.

The Second Conditional can present a future situation as more remote or hypothetical. The choice between the First and Second Conditional depends on the speaker’s perspective, not a fixed percentage probability.

Can, may and might can be grammatically appropriate in the result clause. They are not errors; the exercises for this particular rule simply practise the typical pattern with will and its communicative functions.

First, find the future condition: what might still happen? Then find the result: what will happen, or what will someone decide to do? Finally, ask why the speaker is saying this now.

A prediction centres on the expected connection between events; a plan on an action chosen in advance; a promise or offer on personal willingness; a warning on helping someone avoid harm; and a threat on applying pressure through a controlled negative consequence.

In your own answer, you can change the vocabulary and clause order as long as you preserve the condition, result and intended purpose. The model gives one natural option, not the only permitted wording.