In the sentence "What I really like about Spain is the weather," the subject is "I," the verb is "like," and the object is "the weather." This sentence follows the Subject-Verb-Object (SVO) structure, which is a common way of arranging the elements of a sentence in English. The subject is the person or thing performing the action described by the verb, the verb is the action being performed, and the object is the thing or person receiving the action. In this case, "I" is the subject, "like" is the verb, and "the weather" is the object.