Question

Change into passive voice who has knocked at the door

Answer 1

The door has knowked by whom?

Answer 2

$\red{\huge{\underline{\overline{\mid{\bold{\purple{ \: \: ANSWER \: \: \red{\mid}}}}}}}}$

✔$\underline{ \underline{ \bold{ \purple{ \: \: Active \: \: Voice \: \: }}}} \:$ ➡

$\bold{Who \: \: has \: \: knocked \: \: at \: \: the \: \: door \: ? }$

✔$\underline{ \underline{ \bold{ \purple{ \: \: Passive \: \: Voice \: \: }}}}$➡

$\bold{By \: \: whom \: \:has \: \: the \: \: door \: \: been \: \: knocked \: ?}$

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$\underline{\underline{\mathfrak{\huge{\pink{ \: \: EXTRA \: \: NOTE \: \:}}}}}$

$\underline{ \huge{ \bold{ \red{ \: \: Active \: \: Voice \: \: }}}} \:$

$\bold{A \: \: verb \: \: is \: \: in \: \: the \: \: active \: \: voice \: \: when \: \: its} \\ \bold{form \: \: shows \: \: that \: \: the \: \: person \: \: or \: \: thing \: \:} \\ \bold{denoted \: \: by \: \: the \: \: subject \: \: does \: \: something \: .}$

$\underline{ \huge{ \bold{ \red{ \: \: Passive \: \: Voice \: \: }}}}$

$\bold{A \: \: verb \: \: is \: \:in \: \: the\: \: passive \: \: voice \: \: when \: \: its} \\ \bold{form \: \: shows \: \: that \: \: something \: \: is \: \: don \: \: to \: } \\ \bold{the \: \: person \: \: or \: \: thing \: \: donoted \: \: by \: \: the \: \:} \\ \bold{ subject \: .}$

$\underline{\underline{\mathbb{\pink{\huge{ \: \: STRUCTURE \: \:}}}}}$

$\underline{ \huge{ \bold{ \red{ \: \: Active \: \: Voice \: \: }}}}$

$\bold{subject \: + \: has \: + \: past \: \: participle \: \: form } \\ \bold{ \: of \: \: verb \: + \: object \: .}$

$\underline{ \huge{ \bold{ \red{ \: \: Passive \: \:Voice \: \: }}}} \:$

$\bold{subject \: (object \: \: of \: \: the \: \: active \: \: voice) \: + \: has} \\ \bold{ \: + been \: + \: past \: \: participle \: \: form \: \: of \: \: verb \: + } \\ \bold{ \: object \: (subject \: \: of \: \: the \: \: active \: \: voice \:)}$

$\bold{In \: \: interogative \: \:active \: \: voice \: \: having \: \: } \\ \bold{\red{wh} \: \: questioning \: \: word \: \: \red{who} \: \: change } \\ \bold{into \: \: \red{by \: \: whom} \: \: in \: \: passive \: \: voice \: .} \:$

$\underline{ \mathbb{ \huge{\pink{ \: \: IN\: \:THE \: \:GIVEN\: \:QUESTION \: \: }}}}$

$\underline{ \huge{ \bold{ \red{ \: \: Active\: \: Voice \: \: }}}}$

$\bold{Who \: + \:has \: + \: past \: \: participle \: \: form \: } \\ \bold{of \: \: verb \: + \: object} \\ \\ \\ \bold{Past \: \: participle \: \: form \: \: of \: verb = > knocked} \\ \\ \bold{ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: Object \: = > at \: \: the \: \: door}$

$\underline{ \huge{ \bold{ \red{ \: \: Passive \: \: Voice \: \: }}}}$

$\bold{By \: \: whom \: + \: has \: + object \: \: of\: \: active \: \: voice} \\ \bold{ + been \: + \:past \: \: participle \: \: form \: \: of \: \: verb}$