1)there were a lot of people in the office yesterday afternoon ,but there is only one person here now
2) The weather didn't very nice last weekend ,but it is beautiful now
3) My mother is retired now ,but for most of her life she was a teacher.
4) We didn't at home yesterday ,but we are here today
5) the food here was fine last week ,but this meal don't very good
6) i didn't very well yesterday and i don't well today
7) Svetlana was at school at school with me when we were children and now she is a famous politician.
8) there were a lot of people at the concert last night ,but there doesn't many hare tonight.
9) i can see you are very happy to day ,Whats the matter? you was OK yesterday
Объяснение: Present simple : to be( am/is/are) + subject + verb
Past simple : to be ( was/were) + subject + verb
negative : doesn't / don't or didn't