a) Form

1.- Regular verbs: Bare Infinitive + ed

Examples:

	Present		Past
Watch	I work every day		I worked every day
Work	I watch television at the weekend		I watched television at the weekend
Play	I play football at school		I played football at school

2.- Irregular verbs: ver lección 10º Curso de Inglés (www.aulafacil.com)

b) Use

1.- To talk about things that happened in the past:

I stayed in that hotel last week

He worked all night and finished the project

2.- To talk about the general past and about regular actions:

We lived in Rome for a year when I was a child

Our friends often visited us there