Conditional sentences describe a conditional state or an outcome that depends on the occurrence of another event. “If” something happens, “then” the conditional situation will occur. In other words, for an event to occur, the existence of certain conditions or the occurrence of another event is required.

Each conditional sentence consists of two parts:

A: if clause or part of the condition that starts with if; like the :

…If you come

B: Main clause or the main clause or the result of the condition; like the :

…You will see him

Usually, the condition part is written first and the result follows, in which case the existence of <,> between the two parts is necessary, but if the result part is written first and then the condition part, there is no need for a comma. Therefore, the above example can be expressed in the following two ways:

If you come, you will see him

If you come, you will see him.

You will see him if you come

If you come, you will see him.

Types of conditional sentences

There are four types of conditional sentences which are:

1- Zero type: (Present tense – general facts)

1-Type 0: (Present – ​​General truths)

2- The first type: (future tense – probable)

2-Type 1: (Future-probable)

3- The second type: (present tense – unreal)

3-Type 2: (Present-unreal)

4- The third type: (past tense – unreal)

4-Type 3: (Past – unreal)

Conditionals Type 0

Conditional sentences of the zero type indicate the present tense and are used to express a fact that always happens and are used to express general conditions and facts, not a specific situation. In these sentences, both the conditional and the result are in simple present tense.

Grammar structure:

simple present +… + simple present + If

If water reaches 100 degrees, it boils

If water reaches 100 degrees, it boils.

Conditionals Type 1

Conditional sentences of the first type indicate the future time and express something that is likely to be done. In these sentences, the conditional part is simple or imperative in the present tense, and the result part is simple future.