Sure! Here are the corrected sentences:

1. Oh no! The crystal vase is going to fall over.
2. They will decorate the house as soon as they find a good interior designer.
3. Next year I will have lived in this city for twenty years.
4. They may be moving to the countryside when they sell their flat.
5. Do the job properly or I won’t pay you.
6. Samantha will have spent all her money before the house is finished.

For the gaps in the text:

A footballer's life

Meet Blaine Goonie. He's a football player with Manchester United. By this summer, he will (1) **have** been with the team for five years. Next week, he (2) **is** going to travel to Spain to play in a very important Champions League match. Unfortunately for Blaine, the experts predict Real Madrid (3) **will** probably (4) **be** holding the cup on Saturday night. By next week, he (5) **will** have played in four cup finals.

Blaine makes a lot of money and he knows how to spend it! He and his wife, Jolene, are (6) **going** to buy a castle in the English countryside! They (7) **are** getting a famous Italian interior designer to decorate it and when the castle is ready, a celebrity magazine (8) **will** visit them to take photos of it. Blaine and Jolene love the attention! They have been famous for a long time, but they never get tired of it!