The Spanish language is unique because although many words have the same literal definitions, sentence context can change word meaning. Unlike English, with prepositions, placement in sentences determines their definitions.
Phrases With "a"
The "a" in many verb phrases conveys no specific meaning. For example, it's used with a form the verb "ir" to express an event in the future, like "Yo voy a estudiar.” or after a pronoun. The "a" is also used before a direct object that is a person: "Yo voy a llamar a mi amiga." The "a" can also assume its common definition, "to," in sentences like "Yo voy a la escuela" or "Yo voy a San Antonio." Some expressions involving time also depend upon "a": "La fiesta es a las nueve."
Uses of "en"
The "en" in Spanish sentences typically means "by," "on" or "in." It can convey location or place: "Yo estoy en el parque" or "El libro está en la mesa." Generalizations about subjects also use "en": "Mi amigo es bueno en matemáticas." With the verb "ir," "en" relays method of travel: "Yo voy en coche." In time expressions, "en" means "in": "Yo voy en el verano." Using “en” also contributes to spanish prepositions, nouns, adverbs, and indirect objects. For example, “Tengo mucho perros en mi casa. Son un regalo de juan y maría”.
When learning spanish, its important to learn the differences between “a” and “en” when learning conjugation and spanish grammar. Spanish teachers can help beginner learners with these commonly used spanish words.
Tip
You can always ask for help from a native spanish speaker.
First time language learners might want to take spanish lessons to learn difficult topics within the grammar rules such as reflexive and infinitive.
Be aware of differences between Latin American spanish and spain spanish.