Imagine you have an old watch, and you are showing it to a friend. And your friend says "That's a great watch, I wish I had one exactly like it." And you say "Yes, it is a great watch, but it's very old, and if I dropped it tomorrow, it would break".
If I lost my job tomorrow, it would be hard to find another one with the same salary.
If Frank spoke French he could work as an interpreter at the United Nations next year.
If Helen learned to drive, she could take her children to private school next year.
Remember, strictly speaking English does not have a future tense, and information about "when" an action is happening in the future is either in the context or in other parts of speech (frequently adverbials like "tomorrow", "next year", etc....)
I hope that helps,