Помогите Срочно!
Grammar.The Past Continuous Tense.
1.This time last Monday I.......... (to sit) on a beach.
2.When you saw me last,I....... (to wear) a new dress.
3.She..... (to speak) for two hours.
4They..... (to wait) for you more than an hour.
5.He....... (to work) when we were back.
И объясните почему так пишем?

Все равно спасибо вы мне ответили,нужно для экзамена ;)

1.This time last Monday I sitting on a beach.2.When you saw me last,l wearing a new dress.3.She speaking for two hours.4They waiting for you more than an hour.5.He working when we were back.Но я не уверена,что это правильно