Question:

Choose the correct passive or active form of the given sentence. “They have to paint the ceiling before they can install the new light fixtures.”

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Always check subject-verb agreement after shifting an object to the subject position! A singular passive subject like "the ceiling" must be paired with "has to be," never "have to be."
Updated On: May 19, 2026
  • The ceiling has to be painted before the new light fixtures can be installed.
  • The ceiling have to be painted before installing the new light fixtures.
  • Before the new light fixtures can install, the ceiling has to be painted.
  • The ceiling must be painted by them prior to installing the light fixtures.
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The Correct Option is A

Solution and Explanation


Step 1: Understanding the Concept:

Voice conversion involves shifting the focus of a sentence from the performer of the action (active voice) to the recipient of the action (passive voice). When a sentence contains multiple clauses connected by a conjunction, both clauses must be converted into their corresponding passive structures while maintaining subject-verb agreement and the original tense.

Step 2: Detailed Explanation:

Let's break down the given active sentence into its two component clauses: 1. Clause 1 (Active): "They have to paint the ceiling..." The active structure uses "have to + verb (base form)". Passive structure rule: "Object + has/have to + be + past participle (V3)". Since "The ceiling" is singular, it takes "has to be": "The ceiling has to be painted..." 2. Clause 2 (Active): "...before they can install the new light fixtures." The active structure uses the modal verb "can + verb (base form)". Passive structure rule: "Modal + be + past participle (V3)". The object is "the new light fixtures" (plural): "...before the new light fixtures can be installed." Combining both converted clauses gives: "The ceiling has to be painted before the new light fixtures can be installed." This aligns with Option (a). Option (b) fails due to incorrect subject-verb agreement ("ceiling have to"), and Option (c) leaves the second clause in an ungrammatical active state ("fixtures can install").

Step 3: Final Answer:

The correct passive form is option (a).
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