βάλει

In a sentence

• Θέλω να βάλω το κλειδί στην πόρτα.

  I want to put the key into the door.

  In this sentence, 'βάλω' (a form of 'βάλει') is used to indicate placing or inserting something.

• Μπορείς να βάλεις αυτό το βιβλίο στο ράφι;

  Can you put this book on the shelf?

  Here, 'βάλεις' (a form of 'βάλει') is employed to request someone to place an object in a specific location.

• Θα ήθελα να βάλεις λίγη περισσότερη προσπάθεια.

  I would like you to put in a little more effort.

  In this case, 'βάλεις' (a form of 'βάλει') is utilized metaphorically to suggest exerting effort.