Prepositions are words that help us to establish relations between different elements of a sentence. They can show a movement, time and position relationship among two or more objects within the sentence.

Spanish prepositions do NOT take on masculine and feminine or singular and plural. They will always have the same form. Prepositions can be single, formed by only one word, or complex, formed by more than one word.

for me           - para mi      for us             - para nosotros
for you          - para ti      for you all        - para ustedes
for you (formal) - para usted   for them (males)   - para ellos
for him          - para él      for them (females) - para ellas
for her          - para ella

The word "with" in Spanish is "con". It is a special case with the following pattern.

with me  - conmigo      with us             - con nosotros
with you - contigo      with you all        - con ustedes
with him - con él       with them (males)   - con ellos
with her - con ella     with them (females) - con ellas