Question

They ought to have repaired the bridge long ago. The passive form is ?

• A. They are ought to have been repaired the bridge long ago
• B. The bridge ought to have been repaired long ago
• C. The bridge ought to have been repaired by them long ago
• D. The bridge ought to have been repaired long ago by them

Answer 1

Answer:

B. The bridge ought to have been repaired long ago

• Subject: They

• Verb: ought to have repaired

• Object: the bridge

• Time Adverbial: long ago

Rule & Conversion:

• Structure: Subject + ought to have + V3 + Object $\rightarrow$ Object + ought to have been + V3 (+ Adverbial)

• The active verb phrase "ought to have repaired" changes to the passive form "ought to have been repaired".

• The subject "They" represents an indefinite/unimportant agent, so "by them" is omitted in the preferred passive construction.

• Correct Passive: The bridge ought to have been repaired long ago.