John: Only if you knew...

It's a second conditional with the main clause left out. The "only if you knew" part implies that Jane isn't aware of something that is relevant to the situation so it's not just a minor issue as she apparently thinks.

In this context, the phrase would be

"If only you knew..."

or

"If you only knew..."

It's part of the second conditional; John knows that Jane doesn't know sth, and is thinking about what would happen if she did, i.e., an impossible present. ()

Hi,

What does "Only if you knew..." mean? Please help me with it. I hope the rest of the two sentences are correct.

John: You don't know what trouble you are in and what the consequences could be.

Jane: It's just a minor issue.

John: Only if you knew...

This is a shor

Actually I had this in mind:

John: Only if you knew that they can dismiss you from the job.

Is this a condition sentence or a shortened form as Clive suggested. I'm confused. Please help me with it. Thanks.

Regards

Jackson

Only if you knew they could dismiss you from your job. (it's still a conditional sentence (conditional I in this case); John doesn't know now whether Jane knew (in the past) that she could lose her job)

Thank you, Ivanhr.

Where do I get list of these conditional I, II, etc? Please let me know. Thanks

Masha linked this https://sites.google.com/site/marysenglishcourse/home/extras/grammar-reference-pages/grammatical-s

This one for example http://en.wikipedia.org/wiki/Conditional_sentence