jueves, 12 de enero de 2017

zero conditional Grammar

Zero Conditional

for certainty
If you heat ice, it melts.
We use the so-called zero conditional when the result of the condition is always true, like a scientific fact.
Take some ice. Put it in a saucepan. Heat the saucepan. What happens? The ice melts (it becomes water). You would be surprised if it did not.
ifconditionresult
 Present SimplePresent Simple
Ifyou heat ice,it melts.
Notice that we are thinking about a result that is always true for this condition. The result of the condition is an absolute certainty. We are not thinking about the future or the past, or even the present. We are thinking about a simple fact. We use the Present Simple tense to talk about the condition. We also use the Present Simple tense to talk about the result. The important thing about the zero conditional is that the condition always has the same result.
Look at these example sentences:
ifconditionresult
 Present SimplePresent Simple
IfI miss the 8 o'clock bus,I am late for work.
IfI am late for work,my boss gets angry.
Ifpeople don't eat,they get hungry.
Ifyou heat ice,does it melt?
resultifcondition
Present Simple Present Simple
I am late for workifI miss the 8 o'clock bus.
My boss gets angryifI am late for work.
People get hungryifthey don't eat.
Does ice meltifyou heat it?

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