if clause

Definition of Conditional Sentence

Conditional sentence is a complex sentence (compound sentence) formed from the subordinate clause that begins with a subordinate conjunction if a condition (condition) and the main clause of a result / consequence (result).
There are 4 types of conditional sentence commonly used, namely: type 1, type 2, type 3, and type 0. Condition on the conditional sentence may be filled with type 1, type 2 or almost impossible not fulfilled, type 3 can not be met (unreal) , while type 0 is always realized as a scientific fact / scientific truth.

General formula
In general, this assumption sentences formula is as follows:
if + condition, result/consequence

without punctuation or commas :
result/consequence + if + condition

Conditional Sentence various types of
Type              Rumus Conditional Sentence
0.                   if + simple present, simple present
1                    if + simple present, will + bare infinitive
2                    if + simple past, would/could/might + bare infinitive
3.                   if + past perfect, would/should/could/might have + past participle

Examples of Conditional Sentence
Here's an example of a conditional sentence on various types in accordance with the above formula .
Type              Contoh Conditional Sentence
0                     If we flush the fabric, it gets wet.
1                     If we travel to London, we will visit the museums.
2                     If you don't get out of here I'll call the police.
3                     If we had played a little better, we could have won the game.

Negative if + condition
Formula : if ... not be replaced with unless.
Examples of conditional sentence : if ... not and unless : By using the formula if negative , the conditional sentence as an example below.
• If the students do not understand , they will raise their hand to ask.
• Unless the students understand , they will raise their hand to ask