Conditional sentences. Missing “would”

On the surface, it would seem that conditional sentences omitting the word “would” suggest real conditional, as the word “would” generally implies that which is unknown. However, conditional sentences use modal verbs instead of the word “would”.

The following expresses the construction of modal verbs:

would + can = could

If I could find the energy, I will study for my exam.

The speaker explains that it is unknown if they will find the energy to study. They can study if it is found.

would + shall = should

If any should call, please take a message.

The speaker is requesting for the listener to take a message if someone calls. It is unknown if someone will call.

would + may + might

If I might say, I am going to see the doctor on Monday.

Since the words “could”, “should” and “might” indicate conditions, they can not be used with the word “would”.