If-Whether | Commonly Confused Words

If

A word used to introduce a condition or a possibility

I can't tell if he's messing around or legitimately annoyed.Ned worked quickly to set if free.Or, if he did it meant the loss of Hortense.

This word has no antonyms

/ˈweðə/

Used to introduce alternatives or express doubt between choices

Life moves forward, whether you like it or not.Whether Sophronia was adopted by his mother?Meg did not know whether to laugh or cry.

This word has no antonyms

If is usually used to express a condition, as in If it rains, we will stay inside.
Whether often implies a choice, as in I dont know whether to go to the party or stay home'.
If is hypothetical and depends on something else happening.
Whether can be seen as presenting two potential outcomes or scenarios.
Use if to introduce a possible condition; use whether to explore options or doubt.