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Simple past tense
Simple past is formed for regular verbs by adding –ed to the root of a word. Example: He walked to the store. A negation is produced by adding did not and the verb in its infinitive form. Example: He did not walk to the store. Question sentences are started with did as in Did he walk to the store?
Simple past is used for describing acts that have already been concluded and whose exact time of occurrence is known. Furthermore, simple past is used for retelling successive events. That is why it is commonly used in storytelling.
Past continuous tense
Past continuous tense is formed by using the adequate form of to be and the verb’s present participle: He was going to church. By inserting not before the main verb a negation is achieved. Example: He was not going to church. A question is formed by prefixing the adequate form of to be as in Was he going?.
Past progressive is used for describing events that were just about to occur when a new event happened. The already occurring event is presented in past progressive, the new one in simple past. Example: We were sitting in the garden when the thunderstorm started. Use is similar to other languages' imperfect tense.