The conditions for using a 把 sentence were briefly mentioned above. These are:
• The object is known. (It's already been mentioned or discussed previously.)
• The sentence describes what happened to the object in some detail (it's not just a "bare" verb; there's "more stuff" after the verb).
Known object
把 sentences can only deal with objects that are previously known about or have been clearly established in context. In other words, 把 sentences should have objects that are obvious.
This means that the object must either be definite (often preceded by 'the' in English), or generic. A generic object is a general class of things that the listener should know about. For example: