Simple Present: In the affirmative we use the base form of the verb with I, YOU, WE and THEY., In the affirmative form we add +S or +ES to the end of the verb if the subjects are HE, SHE or IT., In the negative we use DON'T + BASE FORM for the subjects I, YOU, WE, THEY, In the negative we use DOESN'T + BASE FORM for HE, SHE, IT., In the questions we use DO before I, YOU, WE, THEY and the BASE FORM of the verb., In the interrogative we use DOES + HE, SHE, IT and the BASE FORM of the verb., Some common time expressions are: every (day,week), sometimes, never, on (Mondays) etc, We use it when we want to talk about habits, things we do frequently or general truths and facts., The verb to be has three forms: AM, IS, ARE., The negative form of be is: AM NOT, ISN'T, AREN'T., In questions with be we change the positions of the verb and the subject. (Are you? Is he? Am I?), Simple Past: We use it to talk about an action that started and finished in the past., Some common expressions are: yesterday, (a month) ago, last (year)., In the affirmative, we have to add +ED; +D; +IED to the end of regular verbs., In the affirmative, I have to change the verb if it's irregular. For that, we have a list., I don't change the verb in the negative or interrogative., In the negative, we use DIDN'T + BASE FORM, for all subjects., In questions we use DID + I, YOU, HE, SHE, IT, WE, YOU, THEY and the BASE FORM of the verb., The verb to be has two forms: WAS and WERE., The negative form of to be is WASN'T and WEREN'T. , In questions with be we change the positions of the verb and the subject. (Were you? Was he? Was I?),

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