Question

The Chinese discovered acupuncture thousands of years ago into passive voice

Answer 1

Answer:

Acupuncture was discovered by the chinese thousands years ago

Answer 2

Acupuncture was discovered by the Chinese thousands of years ago. -This is the answer.

About passive voice:

• The given sentence is in active voice. We have to change it into passive voice.
• When a sentence is changed into passive voice, the subject becomes passive/ inactive. So the subject 'The Chinese' becomes 'by the Chinese'.
• The object and the action done take importance. So the passive sentence begins with the object of active form 'acupuncture'.
• The tense must be retained. The verb takes its past participle form.
• The 'be' verb will precede the past participle according to its tense. So the verb 'discovered' becomes 'was discovered'.
• The phrase 'thousands of years ago' can remain unchanged.
• Therefore the answer is: Acupuncture was discovered by the Chinese thousands of years ago.