Unit 1 Grammar: Past simple

We use the past simple to describe an action that started in the past and ends in the past. It could be something that happened twenty years ago or something that happened two minutes ago. 

The most common time expressions used for the past simple are: yesterday, a week (month, year) ago, last (month, year, weekend, Monday) night, the day before yesterday, two days (months, years) ago. The time expression appears either at the beginning or at the end of the sentence – never in the middle of the sentence.

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