2. If Paco had known about the bad weather conditions, he would have changed his tour of the U.S.A.

Third type conditional sentences are easily recognizable: they cannot be fulfilled because they refer to past actions. Let's study them.
Don't worry: we'll study this kind of conditional, as well as type 1 and 2 in the next unit -unit 6. But here you have some work on the structure and meaning of conditionals.
Icono IDevice Important
He would not have had an accident if he had driven more slowly.
A car crash in New York.
By DYFL. Creative Commons.
First of all, there are 3 types of conditional sentences:
- Type 1: If the weather is good tomorrow, we will go for a picnic in the country.
- Type 2: If I won the lottery, I would buy a big house in Miami.
- Type 3: If the weather had been good yesterday, we would have gone for a picnic in the country.
Type 1 conditional sentences  are possible to fulfill:
  • She will do the shopping with us if she gets home early. (type 1)(it's possible that she will get home early)
  • If you hit me, I will call the Police. (type 1)it's possible that you will hit me)
Type 2 conditionals are more hypothetical, less probable:
  • If I were the president, I'd reduce taxes. (type 2) (it's not very probable that I will be president)
  • If he studied hard, he would pass all his exams easily. (type 2)(but he doesn't want to study)
However, conditional sentences type 3 are impossible. Their condition can't be fulfilled because they refer to the past. It is used to express a hypothetical result to a past given situation:
  • He would have arrived in time if he had left his house earlier.(he didn't leave his house earlier, so he didn't arrive on time)
  • If they had come to Chicago, they would have seen the Lake Michigan.(they didn't come to Chicago, so they didn't see Lake Michigan)


Icono de iDevice Solved exercise

A conditional sentence is made up of two parts: a main clause and the 'if' clause. The 'if' clause states de condition and the main clause its consequence in the case that condition happens.

Take into account that third conditional sentences are used to talk about unreal situations in the past, that is, things which did not happen in the past.
Have a look at these third type conditional sentences:
  • If you had studied more, you would have passed.
  • If you had asked your teacher for help, he would have helped you.
  • If it had not started to rain, we would have gone to visit the exhibition.
 
VERY IMPORTANT: You can change the order of clauses, but then, you have to change the order of the verbal tenses too:
 
She would have come to the party if you had invited her= If you had invited her, she would have come to the party. 
 
NEVER: She had come to the party if you would have invited her. 
Try to deduce the structure of third conditional sentences.


If Clause

Main clause

Conditional Type 1

Present

Present / Future

Conditional Type 2

Simple Past

Conditional would

Conditional Type 3





Icono de IDevice de pregunta Self-assessment activity
Choose the appropriate second part of these third conditional sentences:
1. If the weather had been nicer, ...
  
a. we would have played football in the park.
b. we would play football in the park.

2. If the boys had taken the bus to school, ...
  
a. they would have arrive on time.
b. they would have arrived on time.

3. If he had spoken English, ...
  
a. he would have understood the tourists.
b. he would understand the tourists.

4. 4. If you had bought some vegetables, ...
  
a. a salad for dinner would have prepared.
b. we would have prepared a salad for dinner.

Icono IDevice Curiosity
2010 Federal Holidays

Federal law (5 U.S.C. 6103) establishes the following public holidays for Federal employees. Please note that most Federal employees work on a Monday through Friday schedule. For these employees, when a holiday falls on a nonworkday -- Saturday or Sunday -- the holiday usually is observed on Monday (if the holiday falls on Sunday) or Friday (if the holiday falls on Saturday).

Displays of fireworks, such as these over the Washington Monument, take place nationwide.

Fourth of July fireworks behind the Washington Monument, 1986
By SSGT. LONO KOLLARS. Public domain
Thursday, January 1 New Year’s Day
Monday, January 19 Birthday of Martin Luther King, Jr.
Monday, February 16 Washington’s Birthday
Monday, May 25 Memorial Day
Friday, July 3 Independence Day
Monday, September 7 Labor Day
Monday, October 12 Columbus Day
Wednesday, November 11 Veterans Day
Thursday, November 26 Thanksgiving Day
Friday, December 25 Christmas Day

Taken from USA Government.

Icono IDevice Further knowledge

 

Click here to learn about uses and formation of conditionals.

The structure of a third conditional sentence.

 


How much do you know about the passive voice? Don't worry, In the next section you are going to learn all about it.