First and second conditionals
El first y el second conditional hablan los dos del futuro; la diferencia es cómo de probable lo ve el hablante. Aquí trabajas los patrones if + present → will e if + past → would.
Aprendizaje rápido
El first y el second conditional hablan los dos del futuro. La diferencia es cómo de probable lo considera el hablante.
Recuerda
- First: if + present, luego will. Real y posible.
- Second: if + past, luego would. Poco probable, imaginario o hipotético.
- El pasado del second conditional no es tiempo pasado; marca distancia de la realidad.
Ejemplos
- 1If the train arrives on time tomorrow, we will reach the hotel before sunset.
- 2If I were you, I would speak directly to the manager about your concerns.
Error común que evitar
will no va detrás de if en el first conditional. La oración con if se queda en present aunque el significado sea futuro.
Profundiza
La regla
Real or imagined
Conditional sentences evaluate the relationship between a condition and its consequence. At Level B1, learners must master the clear contrast between real/likely possibilities (First Conditional) and hypothetical/unreal situations (Second Conditional).
First conditional
(1) First Conditional (Real / Likely Future): Evaluates an authentic condition that has a realistic possibility of happening in the future. Formula: If + Present Simple, will / can / might + bare base verb.
- If the weather is sunny tomorrow, we will cycle to the beach
- If you study hard, you will pass the exam
The speaker considers the event entirely feasible.
Second conditional
(2) Second Conditional (Hypothetical / Unreal Present or Future): Evaluates an imaginary, counterfactual, or improbable scenario contrary to present reality. Formula: If + Past Simple, would / could / might + bare base verb.
- If I had more free time, I would learn how to play the cello
- If I won the lottery, I would buy a house near the coast
The past tense here does not express past time; it signifies hypothetical distance from reality.
If I were you
Were Rule in Second Conditional: In formal and standard English, the subjunctive were is used for all persons with be:
- If I were you, I would accept that job offer
- If she were here, she would know what to do
Anatomía de la frase
Frases de esta lección, separadas en sus partes en el orden que exige el inglés.
OraciónIf the train arrives on time tomorrow,SujetoweVerbo auxiliarwillVerboreachObjetothe hotelTiempobefore sunset.
OraciónIf we had a spacious garden,SujetoweVerbo auxiliarwouldVerboadoptObjetotwo rescue dogsLugarfrom the shelter.
OraciónIf I knew his personal telephone number,SujetoIVerbo auxiliarwouldVerbocallObjetohimTiempoimmediately.
Palabra interrogativaWhatVerbo auxiliarwouldSujetoyouVerbodoOraciónif you found an expensive leather wallet on the sidewalk?
Guía visual
How to read this B1 topic
At B1, grammar links ideas: condition, result, reported meaning, experience, and narrative order.
1. Name the relationship
Ask whether the sentence gives a condition, contrast, cause, report, or result.
If it rains, we will stay home.
2. Separate time from aspect
Finished event, visible result, duration, and background action use different forms.
I had left before she arrived.
3. Test both clauses
In complex sentences, the second half often proves the first half.
I wish I knew.
Conditional patterns
Read both halves. The result clause often tells you which condition pattern is needed.
| Meaning | If-clause | Result clause | Example |
|---|---|---|---|
| general truth | present simple | present simple | If water freezes, it expands. |
| real future | present simple | will + base verb | If it rains, we will stay. |
| imaginary present | past simple | would + base verb | If I knew, I would tell you. |
| imaginary past | past perfect | would have + participle | If I had known, I would have called. |
Contrasts that often decide the answer
Event or background
Simple forms move events forward; continuous forms show an action in progress.
I left while she was talking.
Fact or stance
Modals, hedges, and reporting structures show how certain or responsible the speaker sounds.
This may indicate a problem.
Clause or compressed phrase
Advanced writing often compresses full clauses into participle, noun, or prepositional phrases.
Having reviewed the data, we revised the plan.
Ejemplos
- 1If the train arrives on time tomorrow, we will reach the hotel before sunset.
- 2If I were you, I would speak directly to the manager about your concerns.
- 3If we had a spacious garden, we would adopt two rescue dogs from the shelter.
- 4She will definitely pass her driving test next week if she stays calm.
- 5What would you do if you found an expensive leather wallet on the sidewalk?
- 6If the temperature drops below zero tonight, the highway will become icy.
- 7If David lived closer to the city center, he would walk to his office every day.
- 8We might visit the contemporary art museum on Saturday if the tickets are affordable.
- 9If I knew his personal telephone number, I would call him immediately.
- 10Unless it rains heavily tomorrow afternoon, the children will play tennis outdoors.
Excepciones
Unless = If Not: The conjunction unless means if not. It introduces an affirmative verb because the negative meaning is already contained within the word: "Unless you leave now, you will be late" (= If you do not leave now...). Modal Variations: While will and would are standard defaults, speakers can use can/could (ability) or may/might (possibility) to vary certainty: "If it rains, we might stay home" (possibility); "If I had a car, I could drive us" (ability).
Errores frecuentes
Inserting will into the if-clause
Error
If it will rain tomorrow, we will stay home.
Correcto
If it rains tomorrow, we will stay home.
The condition clause requires present simple.
Inserting would into the if-clause
Error
If I would have money, I would travel.
Correcto
If I had money, I would travel.
Condition clause requires past simple.
Negative verbs after unless
Error
Unless you don't study, you will fail.
Correcto
Unless you study, you will fail.
Unless already means if not.
Repaso
Lo esencial de la lección en una tarjeta, antes de ponerte a prueba.
Recuerda
- First: if + present, luego will. Real y posible.
- Second: if + past, luego would. Poco probable, imaginario o hipotético.
- El pasado del second conditional no es tiempo pasado; marca distancia de la realidad.
Errores frecuentes
Error: If it will rain tomorrow, we will stay home.
Correcto: If it rains tomorrow, we will stay home.Error: If I would have money, I would travel.
Correcto: If I had money, I would travel.Error: Unless you don't study, you will fail.
Correcto: Unless you study, you will fail.
Ponte a prueba
Di la misma idea en las dos formas y nota el cambio de probabilidad; luego practica.
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