Question

They _________ football in that field before you reach.

• A. shall has been playing
• B. will have been play
• C. will have been playing
• D. None of the above

Answer 1

Answer:

C. will have been playing

The sentence is in the future perfect continuous tense, which is used to show an action that will be continuing up to a point in the future.

📘 Structure:
Subject + will have been + V-ing + ...

📙 Example:

• They will have been playing football in that field before you reach.
  (= When you arrive, they will already be playing and the action will have been continuing.)