Aquí os dejamos unas frases de Futuro Perfecto en afirmativa, las cuales hay que poner en negativa e interrogativa. (Las soluciones están en la parte inferior)

1.Before her birthday, we will have bought the gifts.

2.By the end of December I will have finished the school.

3.Before 8 o'clock, I will have drunk two coffees.

4.By the end of Spring she will have got thin 2 pounds.

5.She will have approved the test before the holidays.

6.Before the weekend, we will have travelled to Chicago.

7.They will have not studied the lesson by this afternoon.

8.They will have understood the translation before tomorrow.

9.Susan and Brian will have organized a party, before Tom gets home.

10.By the end of the weekl I will have paid all the debts.

Recordatorio: Neg: won't have+ vb participio

                        Int: will+suj+hav+vb participio

Soluciones:

1.Will we have bought the gifts before her birthday?

Before her birthday, we will not have bought the gifts.

2.Will I have finished the school by the end of December?
By the end of December I will not have finished the school.

3.Will I have drunk two coffees before 8 o'clock?
Before 8 o'clock, I will not have drunk two coffees.

4.Will she have got thin 2 pounds by the end of Spring?
By the end of Spring she will not have got thin 2 pounds.

5.Will she have approved the test before the holidays?

She will not have approved the test before the holidays.

6.Will we have travelled to Chicago before the weekend?

Before the weekend, we will not have travelled to Chicago.

7.Will not they have studied the lesson by this afternoon?

They will have studied the lesson by this afternoon.

8.Will they have understood the translation before tomorrow?

They will not have understood the translation before tomorrow.

9.Will Susan and Brian have organized a party before Tom gets home?

Susan and Brian will not have organized a party before Tom gets home.

10.Will I have paid all the debts by the end of the week?
I will not have paid all the debts by the end of the week