1. El profesor tiene tiza.
2. Tú tienes mochilas.
3. Los turistas tienen mapa.
4. Usted tiene cuadernos.
5. Nosotros tenemos papelera.

1. El profesor tiene tiza.

Answer 1: Es su tiza.

Translation 1: The teacher has chalk. It is his chalk.

2. Tú tienes mochilas.

Answer 2: Son tus mochilas.

Translation 2: You have backpacks. They are your backpacks.

3. Los turistas tienen mapa.

Answer 3: Es su mapa.

Translation 3: Tourists have a map. It is their map.

4. Usted tiene cuadernos.

Answer 4: Son sus cuadernos.

Translation 4: You have notebooks. They are your notebooks.

5. Nosotros tenemos papelera.  

Answer 5: Es nuestra papelera.

Translation 5: We have a trash can. It is our trash can.

In Spanish,  possessives adjectives indicate possession or belonging. They always agree in gender and number with the noun to which they refer; that is, with the possessed thing. The possessive adjective appears before the noun with which a relationship of belonging is established. If the noun is omitted, then it would be a possessive pronoun.