Nouns (Sustantivos) – Name of a person, place, thing, or idea.
Examples: biologist, laboratory, book, happiness
Sentence: The biologist works in a laboratory.
Pronouns (Pronombres) – Take the place of a noun.
Examples: he, she, it, they, we
Sentence: She works in a laboratory.
Adjectives (Adjetivos) – Describe nouns or pronouns.
Examples: intelligent, small, beautiful, difficult
Sentence: The intelligent student passed the exam.
Verbs (Verbos) – Show action (run, study, write) or state (is, seem, feel).
Sentence (action): She studies every afternoon.
Sentence (state): She is very happy.
Adverbs (Adverbios) – Describe verbs, adjectives, or other adverbs.
Examples: quickly, very, carefully, slowly
Sentence: She carefully prepared the experiment.
Sentence: The exam was very difficult.
Prepositions (Preposiciones) – Show relationship of place, time, direction.
Examples: in, on, at, under, between, behind
Sentence: The book is on the table.
Sentence: She studies in the afternoon.
Conjunctions (Conjunciones) – Connect words, phrases, or sentences.
Examples: and, but, or, because, although
Sentence: She likes biology and chemistry.
Sentence: She studied hard because she wanted to pass.