Question

what is the difference between clause and if clause?

Answer 1

If you are unsure whether a group of words is a clause or phrase, break down the words into the parts of speech to help you decide. If there is a subject and a verb with a predicate, it is a clause. If there is a noun but no verb or a verb but no noun and does not have a predicate, it is a phrase

Answer 2

First conditional:If I have enough money, I will go to Japan.
2. Second conditional:If I had enough money, I would go to Japan.
3. Third conditional:If I had had enough money, I would have gone to Japan.