subject pronouns

Subject pronouns are generally used only for emphasis of clarification.

Generally, the use of tú is reserved for those individuals whom you call on a first name basis. Usted is most frequently used with individuals with whom you've just met, or whom you refer to as mister or misses.

In some countries however, the use of vosotros has become much more commonly used than ustedes.

When combination subjects such as he and I or you and she are used in Spanish, there are "strong" and "weak" pronouns: yo is stronger than tú, tú is stronger than él and ella, and usted is stronger than tú.

a. tú + yo = nosotros and él + yo = nosotros.
b. tú + él or ella = vosotros
c. tú + usted = ustedes

In Spanish, there is no impersonal subject pronoun "it." Rather, "it" is expressed by the third person singular verb form.

Llueve mucho hoy.	- It is raining a lot today.
No funciona.	- It doesn't work.
Es difícil ganarse la vida.	- It is difficult to make/earn a living.