Past regular verbs-negative& interrogative forms

Here you can see how the negative and interrogative forms are done and you can practise them too.
http://www.learn-english-today.com/lessons/lesson_contents/past_simple_lesson.html
http://www.clafoti.com/Imagenes/past_simple_of_regular_verbs1.htm
http://www.tolearnenglish.com/exercises/exercise-english-2/exercise-english-30994.php