All sentences in active voice cannot be changed into passive voice. Assess the statement

A rule for changing active voice into passive voice is that the object becomes the subject of the passive verb. Therefore, only active transitive verbs which have objects can be changed into passive voice. Therefore the statement, "All sentences in active voice cannot be changed into passive voice." is true, or it can be stated as false with certain exceptions. For example, "She paints", here we have simple present tense, and the verb has no object; hence we cannot change it into passive voice; it will be the same. Therefore, a transitive verb is needed.