Definition

The Simple Past is the Past tense is used for:

Describe the actions that took place in a given time in the past,
Past events that have been completed but whose precise timing is not mentioned, as well as for ...
Describe routines performed before.
Rules

To describe past actions or routines, you need to know the difference between the 2 types of verbs regulars and irregulars.

Regular Verbs
For regular verbs, we have:

If the verb ends in a consonant, you must add the ending "-ed"
If the verb ends in "-e", you should only add the "-d" at the end.
If the regular verb ends in-y, and that letter is preceded by a consonant, change the particle-and-ied.
If the last syllable of the verb, is where the accent falls and it is composed of consonant-vowel-consonant, this consonant be doubled then add "-ed".
If the verb ends in "-l", it should be double and add "-ed".
Irregular Verbs
There are verbs in English, which you can not give the ending "-ed", and then, one must know which is the last of a particular verb in the infinitive.

   Similarly, you should use the appropriate expressions of time to shape the simple past.

However, in sentence formation, should be taken into account some considerations, but I must say that such action is quite simple, once you have studied verbs and their past forms.

   In the case of claims, after we have sealed the subject, you must put the past tense (without adding any "-s" to third parties as in this simple), followed them, they will complement and due expression of time.

   In the case of denials, we add between subject and verb, the auxiliary "did not", as the latter is the last of "do" is unnecessary and wrong (grammatically speaking) to the past tense and that we put into this. For questions, the auxiliary "did" was located before the whole sentence, followed by the subject and the verb again in this, because remember, the auxiliary and tells us that time is past

Sentence Structure

Time Expressions

Word

Complement

Last ... Nigh, week, weekend, month, year, etc..
Aug ... A week, month, day, Centuries, etc.
In ... Year, centuries.
Yesterday, at the morning, nigh, summer, Wednesday, and so on.
Affirmative Prayers

Pronoun / Subject + Verb + Complement + Form Past Time Expression

Negative sentences

Pronoun / Subject + Aux. Did not (did not) + Verb + Complement + Form Present Time Expression

Interrogative sentences

Aux. Subject + Verb + Did Present Time Form + Complement + Expression +?