1. I could to read at six years.
2. I didn`t can open the door, because I lost the key, but luckily I got into the house through the window.
3. You don`t need to wait here, you can go home.
4. Can I come in? - No, you cann`t.
5. Here fishing isn`t allowed.
6. I think. i need to go home, now i have to be home by ten o`clock.