Present simple is used - to talk about routines., Past simple is used  - to talk about past events., To make a sentence in the present we need to use - the infinitive., To make a sentence in the past we need to use - the infinitive and add -ed., The third person singular of the present tense  - needs "the s"., The third person singular of the past tense - doesn't need "the s"., We use the auxiliaries "don't" or "doesn't" to make negative sentences in the - present., We use the auxiliary "didn't" to make negative sentences in the - past., To make questions in the past, we use - the auxiliary "Did" at the beginning of the sentence and then we write the infinitive form of the main verb., To make questions in the present, we use - the auxiliaries "Do" or "Does" at the beginning of the sentence and then we write the infinitive form of the main verb (no s!)., Adverbs of frequency - are mostly used in the present., Adverbs of frequency go - before the main verb most of the times.,

Present & Past simple rules

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