What is a correct passive transformation of "The dog chased the cat"?

In transforming an active voice sentence to passive voice, the focus shifts from the subject performing the action to the object receiving the action. In this case, the original sentence "The dog chased the cat" indicates that the dog is the subject and is performing the action of chasing the cat.

The correct passive transformation is "The cat was chased by the dog." Here, the cat becomes the subject of the sentence and is described as the recipient of the action. The phrase "was chased" indicates that the action has occurred in the past, and "by the dog" identifies who performed the action. This structure maintains the original meaning while highlighting the cat's experience rather than the dog's action.

The other transformations do not correctly convey the passive structure or tense. For example, "The cat is chased by the dog" suggests a present and ongoing action, which deviates from the original past tense. "The dog is chasing the cat" shifts the focus back to the dog in the present continuous tense, while "The dog chased the cat" simply repeats the original active voice without adopting a passive construction.