The second conditional

The Second Conditional is used to express hypogenetic conditions referred to the present, something that is unlikely to occur. An example in Spanish would be "If I had a car, I would go to the beach".

https://www.google.com.co/search?q=que+es+el+second+conditional&source=lnms&tbm=isch&sa=X&ved=0ahUKEwj64_e5psfdAhUFzlMKHcKqCWcQ_AUICigB&biw=1366&bih=662#imgrc=BWuBWZt4qu60pM:

The structure of the second conditional is that of if + simple past + simple conditional (or the modal verbs could and might).

An example: If I had a car, I would go to the beach (If I had a car, I would go to the beach).

As you see if we want to replace the conditional with a modal verb (in this case could or might) we would not have any problem, it would only change in the fact that the probability would be even lower. The sentence would be as follows:

https://www.youtube.com/watch?v=TWBu4iqojl4