Correct the mistakes in these sentences.
1. We lived here since 1997.
2. I've been ill since two days.
3. How long do you know him?
4. Susie has seen a good film last night.
5. We've finished our homework just.
6. I've already wrote three letters.

1. We have been living here since 1997.2. I've been ill for two days. 3. How long have you known him?4. Susie saw a good film last night.5. We've just finished our homework.6. I've already written three letters.