Поставьте глаголы в future continuous. переделайте их  в past continuous, сделав необходимые замены. 
1. Mary (to practise) the piano from two till three tomorrow. 2. When you see menext time, I (to wear) a new dress.
3. When I get home, my dog (to sit) at the door, waiting for me.
4. I think he (still/ to work) when we are back.
5.She (to speak) for not less than two  hours.
6.They (not\to wain) for you more  than an hour.
7.I (still\to sleep) at 10 o'clock tomorrow morning.

Mary will be practising the piano from two till three tomorrowMary was practising the piano from two till three yesterdayWhen you see me next time, I will be wearing a new dressWhen you saw me last time, I was wearing a new dressWhen I get home, my dog will be siting at the door, waiting for me. When I got home, my dog was siting at the door, waiting for me.  I think he will still be working when we are back. I thought he  was still working when we were back.She will be speaking for not less than two hours.She was speaking for not less than two hours.They will be not waiting for you more than an hour.They were not waiting for you more than an hour.I will be still  sleeping at 10 o'clock tomorrow morning.I was still sleeping at 10 o'clock yesterday morning.