I want a real and large definition of MORPHOLOGY

Do you mean how words are formed or constructed in English? In such a case, you are talking about morphology.

It's a third conditional; it refers to a hypothetical action that did not ocurr. "If you had invited me I would have come". It means that if I had got an invitation I would have come, but I didn't come because I didn't receive an invitation.

"If you'd have invited me I would have come." parsing, form, meaning, context, morphology?