Question

passive voice of they know that she works hard​

Answer 1

they know that she works hard.(active voice)

= how hard she works they know .(passive voice)

or

= she works hard.

in the second answer writing "they know" is not necessary..

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Answer 2

you are advised to work hard

Explanation:

this is because when we say "work hard" it means we advice someone to work hard .

it's basically very complex to convert "work hard" into passive and if we go as per the rules then the answer would be "Do work hard" it sound weard

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