1. CONDITIONAL TYPE 1 "Type 1 conditional" is used to refer to the present or future when the situation is real. Type 1 conditional refers to a possible condition and its probable outcome. In these sentences, the "if" clause adopts the "simple present" and the main proposition the "simple future".
1.1. Proposición "if"
1.1.1. Proposición principal
1.1.1.1. simple future
1.1.1.2. that thing will happen.
1.1.1.3. you will miss the train.
1.1.1.4. you will get wet.
1.1.2. If + simple present
1.1.3. If this thing happens
1.1.4. If you don't hurry
1.1.5. If it rains today
2. TYPE 2 CONDITIONAL "Type 2 conditional" is used to refer to a time that can be now or at any time and a situation that is not real. These sentences do not refer to facts. Type 2 conditional is used to refer to a hypothetical condition and its probable outcome.
2.1. Proposición "if"
2.1.1. Proposición principal
2.1.2. present conditional o present continuous conditional
2.1.3. that thing would happen. (no tengo seguridad de que tal cosa sucedería) O that thing would be happening.
2.1.4. you would not be so tired.
2.1.5. you would get wet.
2.1.6. I would be working in Italy.
2.2. If this thing happened
2.3. If + simple past
2.4. If you went to bed earlier
2.5. If it rained
2.6. If I spoke Italian
3. CONDITIONAL TYPE 3 "Type 3 conditional" is used to refer to a time located in the past and a situation contrary to reality. It is based on facts that are opposite to what is being expressed. Type 3 conditional is used to refer to a condition of the past that is not real, as well as its probable outcome in the past. In these sentences, the "if" clause adopts the "past perfect" and the main proposition the "perfect conditional".
3.1. Proposición "if"
3.1.1. Proposición principal
3.1.2. perfect conditional o perfect continuous conditional
3.1.3. that thing would have happened. (ninguna de tales cosas sucedió realmente) O that thing would have been happening.
3.1.4. you would have passed the exam.
3.1.5. you would have gotten wet.
3.1.6. I would have been working in Milan.
3.2. If + past perfect
3.3. If this thing had happened
3.4. If you had studied harder
3.5. If it had rained
3.6. If I had accepted that promotion
4. Conditionals are used to speculate about what might happen, what may have happened and what we would like to happen.
5. ZERO TYPE CONDITIONAL The "zero conditional" is used when the time we are referring to is now or always and the situation is real and possible. This type of conditional is usually used to talk about general facts. The verbal tense of both propositions is the "simple present".
5.1. Proposición "if"
5.1.1. Proposición principal
5.2. If + simple present
5.2.1. simple present
5.3. If this thing happens
5.3.1. that thing happens.
5.4. If you heat ice
5.4.1. it melts.
5.5. If it rains
5.5.1. the grass gets wet.