American English
/ɪf/
One syllable.
Used to say that one thing can happen or be true under a particular condition.
Most speakers pronounce “if” as /ɪf/. In some regional American accents, you may hear /ɛf/.
Used to say that one thing can happen or be true under a particular condition.
If it rains, we'll stay home.
You can borrow my car if you drive carefully.
For a future condition, say “If it rains, we'll stay home,” not “If it will rain.”
if necessary · if possible
if + subject + verb, subject + will + verb
subject + will + verb + if + subject + verb
Used to introduce a yes-or-no question inside another sentence.
I don't know if the store is open.
Can you find out if Ana is coming?
know if · find out if
subject + verb + if + subject + verb
Do you know if + subject + verb?
despite the possibility that something is true or happens
I'll go even if it rains.
used to ask what would happen in a particular situation
What if we miss the last bus?
in a way that suggests something is true, although it may not be
He talks as if he knows everything.