Final answer:
Transforming active sentences into the passive voice involves using a form of the verb "to be" with the past participle of the main verb. The original subject may be included after "by". The examples provided show the sentences rewritten in the passive voice.
Step-by-step explanation:
Converting Sentences into Passive Voice
Converting sentences from active to passive voice requires a form of the verb "to be" and the past participle of the main verb, with the optional addition of "by" followed by the original subject, if needed. Here are the sentences transformed into the passive voice:
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- The house was painted by John last Saturday.
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- The ballpoint pen was invented by the Biro brothers.
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- The answers are being written by Bill now.
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- Two books were read by Alice yesterday.
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- English is spoken very well by them.
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- The cells are implanted in the body by them.
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- Chemical engineers are attracted by tissue engineering.
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- A chest was grown in a lab by a team of American scientists.
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- Patients will be monitored by doctors.
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- Slow computers were used by researchers.
In the passive voice, sentences emphasize the action being done, often at the expense of the doer, which may be omitted if the doer is unknown or irrelevant. This shift in focus can be particularly useful in scientific and technical writing for objectivity.