Rewrite sentences using Past Simple or Future Simple.

Examples: Sally can speak on the phone for hours. – Sally could speak on the phone for hours.

I can join you today. (next Sunday) – I will be able to join you next Sunday.

I can play the piano very well. (when I was 15)
Julia can show you her native town. (next Saturday)
Bill can’t enter this university. (a year ago)
He can’t fix the computer. (last week)
We can win this competition. (next month)
The whole family can’t go for a walk because of bad weather. (yesterday)
The boy can’t attend his friend’s birthday party. (tomorrow)

I could play the piano very well when I was 15Julia will be able to show you her native town next SaturdayBill couldn't  enter this university a year agoHe couldn't  fix the computer last week.We will be able to win this competition next month.The whole family couldn't go for a walk because of bad weather yesterday.The boy won't be able to attend hid friend's birthday party tomorrow.