Conditional Sentences Type I, II und III

conditional Sentences

Conditional sentences are sentences expressing factual implications, or hypothetical situations and their consequences. They are so called because the validity of the main clause of the sentence is conditional on the existence of certain circumstances, which may be expressed in a dependent clause or may be understood from the context.

A full conditional sentence (one which expresses the condition as well as its consequences) therefore contains two clauses: the dependent clause expressing the condition, called the protasis; and the main clause expressing the consequence, called the apodosis.^[1] An example of such a sentence (in English) is the following:

If it rains, the picnic will be cancelled.

Here the condition is expressed by the clause if it rains, this being the protasis, while the consequence is expressed by the picnic will be cancelled, this being the apodosis. (The protasis may either precede or follow the apodosis; it is equally possible to say "The picnic will be cancelled if it rains".) In terms of logic, the protasis corresponds to the antecedent, and the apodosis to the consequent.

Languages use a variety of grammatical forms and constructions in conditional sentences. The forms of verbs used in the protasis and apodosis are often subject to particular rules as regards their tense and mood. Many languages have a specialized type of verb form called the conditional mood – broadly equiva

There are 3 (three) types of conditional sentences :

1. Conditional Sentence Type 1 

The if-clause is in the present tense, the main clause uses will and the infinitive, or simple present.

Conditional Sentence Type 1
TYPE	IF CLAUSE	MAIN CLAUSE	MEANING
Type 1	Simple present If you work hard,	Simple present you succeed. Simple future you will succeed.	True in the present or possible in future It’s possible to happen in the future

 When do we use conditional sentence type 1?

1. We use conditional sentence type 1 to talk about possible situations in the present or future.
• If you leave earlier, you will not be late.
• If you open the windows, the room will get some fresh air.
2. We often use conditional type 1 to talk about facts or processes:
• If you heat water to 100 degrees, it will boil. 
• If we stare into the sun, we will hurt our eyes

2.  Conditional Sentence Type 2

The if-clause is in the simple past or the past continuous tense, the main clause uses would and the infinitive, or would be and the present participle (Verb-ing).

Conditional Sentence Type 2
TYPE	IF CLAUSE	MAIN CLAUSE	MEANING
Type 2	Simple past If you worked hard, Past continuous If it were not raining now,	would + simple form you would succeed. would be + present participle I would be going out for a walk.	Untrue in the present Fact: You don’t work hard, so you don’t succeed Fact:It’s raining now, so I’m not going out for a walk.

When do we use conditional sentence type 2?

Conditional sentence type 2 is used to talk about actions or situations that are not taking place in the present or future, but we can imagine the probable result.

• If we didn’t live in a big city, we would not have to breathe polluted air everyday. (In truth, we live in a big city)
• If he were here, I would tell him about my plan.
  (In fact, he isn’t here)

 3.  Conditional Sentence Type 3 

The if-clause is in the past perfect or the past perfect continuous tense, the main clause uses would have and past participle (Verb 3), or would have been and present participle (Verb-ing).

Conditional Sentence Type 3
TYPE	IF CLAUSE	MAIN CLAUSE	MEANING
Type 3	Past perfect If you had worked hard, Past perfect continuous If it had not been raining yesterday afternoon,	would have + past participle you would have succeeded. would have been + present participle I would have been going out for a walk.	Untrue in the past Fact: You didn’t work hard, so you didn’t succeed. Fact: It was raining yesterday afternoon. I was not going out for a walk.

When do we use conditional sentence type 3?

Conditional sentence type 3 is used to talk about actions or situations that did not take or were not taking place in the past, but we can imagine the probable result.

• If you had come to the party last night, you would have met my cousin. (In truth, you didn’t come to the party last night)
• If he had not been late this morning, his teacher would not have punished him. (In truth, he was late)

Read more: http://www.misterguru.web.id/2011/09/conditional-sentences-type-1-type-2.html#ixzz2NfaJ8zTZ