Englishfor English speakers
if
Preposition
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If is used in a condition:
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# When something will cause something else
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#: If it rains, I will get wet.
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# When a condition is not true
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#: I'd prefer it if you took your shoes off.
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# although
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#: He was a great friend, if a little strange.
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# When ... occurs (a programming statement).
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#: If A, then B, else C.
if
Subordinator
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If is used to report questions and things that are unknown.
She asked if they had arrived yet.
I don't know if I want to go or not.
if
Noun
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If is a conditional situation.
There are many ifs we need to consider before we start on the plan.
not
Adverb
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"Not" makes the verb of a sentence have the opposite meaning.
I was not there.
I am not fat!
not
Conjunction
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The item before "not" is more correct or better than the item after "not".
I wanted tea, not coffee!
Meaning: I wanted tea. I did not want coffee.
It's stupid, not funny.
Meaning: It is stupid. It is not funny.
not
Interjection
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Used to indicate the sentence before is sarcastic or ironic. This means that the sentence has the opposite meaning.
I like doing lots of boring homework. Not!
Meaning: I do not like doing lots of boring homework.
mistaken
Adjective
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If you are mistaken, you are in error.