if
/ɪf इफ़्/ conj. 1 used in sentences in which one thing only happens or is true when another thing happens or is true यदि, अगर, शर्त, अनुमान या कल्पना का भाव व्यक्त करने के लिए प्रयुक्त
If you see him, give him this letter.
We won’t go to the beach if it rains.
2 when; every time जब भी; हर बार
If I try to phone her she just hangs up.
If metal gets hot it expands.
3 used after verbs such as ‘ask’, ‘know’, ‘remember’ कुछ विशेष क्रियाओं ‘ask’, ‘know’, ‘remember’ के बाद प्रयुक्त
They asked if we would like to go too.
I can’t remember if I posted the letter or not.
⇨ whether पर नोट देखिए। IDM
if I were you used when you are giving somebody advice किसी को परामर्श देने के लिए प्रयुक्त
If I were you, I’d leave now.