Grammatical Person The Parts of Speech Noun - a naming word (person, place or thing) Pronoun - a noun substitute Verb - an action (doing or being) word Adjective - a word describing nouns or pronouns Adverb - a word describing adjectives, verbs, or other adverbs Article - definite: ‘the’;  indefinite: ‘a’ & ‘an’ Conjunction - a joining word Preposition - a word that explains position, direction or the relationship between two nouns or noun phrases Interjection - an exclamation Grover Does Prepositions Structure The Basic Forms of Verbs Infinitive  The infinitive of a verb in English has two words and always begins with to .... For example, to learn - aprender - is the infinitive form.  You should treat the infinitive as a unit. Base (or finite) We use the present tense to talk about facts, habits and opinions. The base form drops the to and is is conjugated. Only the third person singular form changes in the simple present tense for regular verbs; you must add an s.  We will s