when do I use "if" and "whether"?

Abraaocoutinho · Thu Jul 10, 2008 20:26 pm *when do I use "if" and "whether"?*

Is there anyone who can give me examples of those conjuctions usage because I can't realize the difference between them.
thanks.
Abraão.

Michauek · Thu Jul 10, 2008 21:07 pm *when do I use "if" and "whether"?*

" If for a conditional idea, whether for an alternative or possibility. Thus, Let me know if you'll be coming means that I want to hear from you only if you're coming. But Let me know whether you'll be coming, means that I want to hear from you about your plans one way or the other. "

After Prepositions , we use only whether.
There was an argument about whether I should go and visit her.

If cannot introduce a subject clause :

Whether she is tired is not so important.
If she is tired is not so important (incorrect)

Generally speaking, use "if" to express a condition.

mike
_________________
absens carens
Michal. I'm an english student Smile

Jctgf · Fri Jul 11, 2008 0:54 am *when do I use "if" and "whether"?*

Even though it's gramatically incorrect, would it be acceptable to use "if" during an informal talk?
I mean in the situations that you have recommended NOT to use it.
Thanks.

Abraaocoutinho · Fri Jul 11, 2008 14:29 pm *when do I use "if" and "whether"?*

thanks for your explanation Michauek.

	ESL Forum \| English Vocabulary, Grammar and Idioms	All times are GMT + 2 Hours
Page 1 of 1