Past simple

We use the past simple to talk about actions and states which we see as completed in the past.We can use it to talk about a specific point in time.

• She came back last Friday.
• I saw her in the street.
• They didn't agree to the deal. (root verb agree with did and did not)

It can also be used to talk about a period of time.

• She lived in Tokyo for seven years.
• They were in London from Monday to Thursday of last week.
• When I was living in New York, I went to all the art exhibitions I could.

You will often find the past simple used with time expressions such as these:

• Yesterday
• three weeks ago
• last year
• in 2002
• for a long time
• in the last century
• in the past

 Root verb (agree) with did and did not:
       She came back last Friday - Positive Sentence
       She did not come back last Friday- Negative Sentence
       She didn't come back lat Friday- Contracted form
  
Yes/ No questions:
    Did she come back last Friday?- Positive Question
    Did she not come back last Friday?- Negative Question
    Didn't she come back last Friday?- Contracted Negative Question.