If you were talking TO Mr. Marchi, you'd use this pronoun to address him.

• yo

• tú

• usted

• él

You'd use this pronoun to talk ABOUT Mr. Marchi.

• Él

• Ud.

• Usted

• ellos

You'd use this pronoun to talk about yourself

• tú

• ella

• usted

• yo

"My friends and I" could be replaced by this subject pronoun

• Vosotros

• Nosotros

• ellos

• ustedes

Use this pronoun to talk to your best friend

• tú

• usted

• tu

• Uds.

Use this pronoun to talk about Mrs. Ramsey

• ella

• usted

• vosotras

• tú

to talk about Paco and María

• ellos

• ellas

• ustedes

• nosotros

to talk TO Paco and María

• usted

• ustedes

• ellos

• nosotros

to talk about Marta and Lucía

• ellos

• ellas

• ustedes

• nosotras

to say "we" if the speaker and all of her friends are female

• ellas

• nosotras

• vosotras

• ustedes