English Grammar - Active Voice and Passive Voice

English Grammar
English Grammar - Active Voice and Passive Voice

Change the following from active to passive: The laboratory will have double-checked the reagents by dawn.


Options:

  1. The reagents have been double-checked by the laboratory by dawn.
  2. The reagents will have been double-checked by the laboratory by dawn.
  3. The reagents will be double-checked by the laboratory by dawn.
  4. The reagents would have been double-checking by the laboratory by dawn.

Right Answer: The reagents will have been double-checked by the laboratory by dawn.

The active sentence stands in the future perfect tense: 'The laboratory will have double-checked the reagents by dawn.' To convert a future perfect active into the passive, the object becomes the subject and the verb takes the form 'will have been' plus the past participle. So 'the reagents' moves into subject position, the verb becomes 'will have been double-checked', and the original subject is reintroduced by 'by the laboratory'. Option one wrongly uses the present perfect, option three uses the simple future, and option four keeps an active continuous form. Hence option two is correct.

This question is part of English Grammar - Active Voice and Passive Voice, which has 15 practice questions with answers.

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