Question

she does her work sincerely change this sentence into all kinds of tenses

Answer 1

yOur sentence is in present indefinite

* present continuous tense [ she is doing her work sincerely or she is working sincerely ]

* present perfect tense [ she has done her work sincerely ]
* present perfect continuous tense [ she has been doing her work sincerely]

* past indefinite [ she did her work sincerely]
* past continuous [ she was doing her work sincerely]
* past perfect [ she had done her work sincerely]
* past perfect continuous [ she had been doing her work sincerely]

* future indefinite [ she will do her work sincerely}
* future continuous [ she will be doing her work sincerely]
* future perfect [ she will have done her work sincerely]
* future perfect continuous [ she will have been doing her work sincerely]

Answer 2

Answer:

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