If it does not have an object, can it be made into a passive sentence?

No, it cannot be made into a passive sentence if it does not have an object. In order to form a passive sentence, you need an object in the active sentence to become the subject in the passive sentence. Here's a step-by-step explanation:

1. Identify the subject, verb, and object in the sentence: In the sentence "The cat chased the mouse", "The cat" is the subject, "chased" is the verb, and "the mouse" is the object.

2. Swap the subject and object: In the passive voice, the object of the active sentence becomes the subject. So, "the mouse" becomes the subject: "The mouse..."

3. Change the verb: The verb needs to be in the past participle form. "Chased" becomes "was chased".

4. Add the original subject: Finally, add the original subject at the end of the sentence, usually after "by". So, the final sentence is: "The mouse was chased by the cat".

If there is no object in the original sentence, there's nothing to become the subject in the passive sentence, so it can't be made passive. For example, the sentence "The cat slept" can't be made passive because there's no object.