Here's a presentation of the present simple of the verb "to be" which in Spanish means "ser" o "estar". Sometimes it may also mean "tener" as in "I'm 25 years old" or "I'm hungry"(Tengo 25 años/ Tengo hambre) or "hacer" as in "It's hot " (Hace calor).
You can find a ppt presentation and some exercises below that may be useful
