To transform the given active sentence into a passive construction, follow these steps:
- Identify the subject, verb, and object: In "He is doing his job well," "He" is the subject, "is doing" is the verb, and "his job" is the object.
- Change the object into the new subject: The object "his job" becomes the new subject of the passive sentence.
- Conjugate the verb appropriately: The active verb "is doing" corresponds to the present continuous tense. In passive voice, this changes to "is being done."
- Add the performer of the action: Optionally, include the original subject at the end of the sentence using "by." In this case, it becomes "by him."
Correct passive construction: His job is being done well by him.
Note: The accurate conversion considers both proper verb form and clarity of original meaning. However, the most grammatically precise choice from the given options would be His job is done well by him since it retains clarity and the present continuous tense is less emphasized in passive options provided.