Negative Sentences in Past Simple

We use "didn't" before the main verb. The structure of a negative sentence in past simple is similar to an affirmative sentence, first, write the subject or pronoun, then, "didn't" followed by the main verb, it goes in base form, and finally the complement and the time expression. Examples: 

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To learn about Past Simple, clic these links:

http://www.englisch-hilfen.de/en/grammar/simple_past_form.htm
http://www.englisch-hilfen.de/en/exercises/tenses/simple_past_negation_sentences3.htm
http://www.ego4u.com/en/cram-up/grammar/simple-past/exercises?05

Practice this song which has a lot of verbs in Past Simple and in all the forms. Let's sing!