What's a good way to learn prepositions?
I have a quiz due at midnight- and im struggling.
Nos compretimos CON la causa de protección del medio ambiente.
^this is an example of a sentence where i have to fill the blank with a prepostion. I initally put 'de' but obviously it's ''çon"
how can I better myself with these prepositions??????? help please!!
3 Answers
Familiarisation is the only way - most of the time they're usually used in exactly the same way as English so just say the sentence in your head substituting different prepositions until you find the one that sounds just right 
Remembering the alternate meanings will especially help - eg, 'a' can mean 'by' or 'by means of' as well as 'to' so use that in your sentence -viajamos 'by' pie - and you can see that it fits.
Here's a list with some examples which may help
a — to, at, by means of — Vamos a la ciudad. We are going to the city.
Vengo a las tres. I am coming at 3.
Viajamos a pie. We are traveling by foot.
antes de — before — Leo antes de dormirme. I read before going to sleep.
bajo — under — El perro está bajo la mesa. The dog is under the table.
cerca de — near — El perro está cerca de la mesa. The dog is near the table.
con — with — Voy con él. I am going with him.
contra — against — Estoy contra la huelga. I am against the strike.
de — of, from, indicating possession — El sombrero es hecho de papel. The hat is made of paper.
Soy de Nueva York. I'm from New York.
Prefiero el carro de Juan. I prefer John's car (I prefer the car of John).
delante de — in front of — Mi carro está delante de la casa. My car is in front of the house.
dentro de — inside — El perro está dentro de la jaula. The dog is inside the cage.
desde — since, from — No comí desde ayer. I haven't eaten since yesterday.
Tiró el béisbol desde el carro. He threw the baseball from the car.
después de — after — Comemos después de la clase. We are eating after class.
detrás de — behind — The dog is behind the table.
durante — during — Dormimos durante la clase. We slept during the class.
en — in, on — Ella está en Nueva York. She is in New York. El perro está en la mesa. The dog is on the table.
encima de — on top of — El gato está encima de la casa. The cat is on top of the house.
enfrente de — in front of — El perro está enfrente de la mesa. The dog is in front of the table.
entre — between, among — El perro está entre le mesa y el sofá. The dog is between the table and the sofa.
fuera de — outside of — El perro está fuera de la casa. The dog is outside of the house.
hacia — toward — Caminamos hacia la escuela. We are walking toward the school.
hasta — until — Duermo hasta las seis. I'm sleeping until 6.
para — for, in order to — El regalo es para usted. The gift is for you.
Trabajo para ser rico. I work in order to be rich.
por — for, by — Damos gracias por la comida. We give thanks for the meal.
Fue escrito por Juan. It was written by Juan.
según — according to — Según mi madre va a nevar. According to my mother it is going to snow.
sin — without — Voy sin él. I am going without him.
sobre — over, about — Se cayó sobre la silla. He fell over the chair.
Es un programa sobre el presidente. It's a program about the president.
tras — after, behind — Caminaban uno tras otro. The walked one after (behind) the other.
You have to learns their functions rather than translations. Prepositions are notoriously tricky because they don´t equate one to one between languages and they describe fairly abstract things. With some expressions you can memorize the prepositions that goes with them.
I just memorized them all. A Ante Bajo Con Contra De Deste En Entre Hacia Hasta Para Por Segun Sin Sobre Tras
Just know what each one means in english... The prepositions are the easy part. The hard part is understanding the rest of the sentence.
