1. I last visited her three years ago => I haven't visited her for three years
2. I haven't met her for a month => I last met her one month ago
3. He hasn't played tennis for 12 years => He last played tennis 12 years ago
4. We last saw our grandfather five months ago => The last time we saw our grandfather was five months ago
Hoặc: We haven't seen our grandfather for five months
5. We haven't written to each other for along time => We last wrote to each other along time ago
6. I last ate raw fish when I was in Japan. => I haven't eaten raw fish when I was in Japan