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1)I can spek English when I was nine.

2)Jane were at home  every day  on Sunday.

3)Peter was in the office, was he?

4)We was at shool.

5)Where do you were yesterday?

1)I could spek English when I was nine.

2)Jane was at home  (every day)  on Sundays.-лучше убрать в скобках- звучит коряво

3)Peter was in the office, wasn*t  he?

4)We were at school.

5)Where were you  yesterday?

1)When I was nine I have could spoke on English

2)Jane was in home everyday on Sunday.

4)We were in the school.

5)Where were you yesterday? (Смотря о чем идет речь, если о ед. числе, то место were пиши was)