S + LAST + V2/ed = S HAVEN'T / HASN'T = THE LAST TIME + S + V2/ed + was +...when/...ago
6. I haven't played tennis since 1990.
-> The last ......................................................................................................
-> I last ...........................................................................................................
7. I haven't seen him for two months.
-> I last ...........................................................................................................
-> The last ......................................................................................................
9. I last heard from him in July.
-> I have .........................................................................................................
-> I last ...........................................................................................................
10. I last read that book on November 20th.
-> The last ......................................................................................................
-> I have .........................................................................................................