A basic English sentence has this structure: S+V+O (Subject plus verb plus object). Thus, while there must be a verb in every sentence, sometimes the verb is not verbalized explicitly (eg, "Up here!" is a short form of saying "COME up here!") An interesting feature of English is the dummy subject. It is possible to have multiple subjects ("Seals and walruses live near the North Pole")..Adjectives are modifiers, and they modify the noun. A special type of adjective used extensively in English is the article, which determines whether a noun is specific or general. Articles are a feature of Romance and Germanic languages, but are seldom used elsewhere. Along with prepositions, they are one of the most difficult aspects of English for my students to master.