Don’t forget: there are regular and irregular verbs.

Look at the table.

Regular verbs – add –d/-ed

Irregular verbs (2nd column) – learn them by heart

 like - liked

 be – was, were

 want – wanted

 say – said

 invite - invited

 hear – heard

 stop - stopped

 go - went

Study the chart.

These comics might help you as well.

Here are some exercises.

Click 1 (positive)

Click 2 (negative)

Click 3 (questions)

Click 4 (all forms)