The passive with by simple past is a grammatical construction where the subject receives the action of a verb in the simple past tense, introduced by the preposition "by" to indicate the doer of the action.
This structure follows the pattern: [object] + was/were + past participle + by + [subject]. It shifts focus from who performed the action to what was acted upon. For example, "The book was written by Jane" emphasizes the book's creation rather than Jane's role as author.
It appears in formal writing, news reports, scientific papers, and technical documentation where the agent (doer) is secondary or unknown. It avoids assigning responsibility, which makes it useful in diplomatic, academic, or legal contexts.
The passive with by simple past uses the auxiliary verb "was" (singular) or "were" (plural) combined with the past participle of the main verb. The agent-the person or thing performing the action-is introduced by "by" and placed at the end of the clause.
Structure: Subject (receiver) + was/were + past participle + by + agent (doer).
Example: "The window was broken by a rock." Here, "window" is the receiver, "was broken" is the passive verb phrase, and "a rock" is the agent.
Verbs must have regular or irregular past participles. Regular verbs add -ed (e.g., walk → walked), while irregular verbs require memorization (e.g., write → written, break → broken).
There are two main forms based on subject number:
| Singular | Plural |
|---|---|
| was + past participle | were + past participle |
| She was interviewed by the reporter. | The documents were signed by the manager. |
Use "was" with singular subjects and "were" with plural ones. The past participle remains unchanged regardless of subject number.
Not all verbs work in passive constructions. Intransitive verbs-those that don't take a direct object-cannot be passivized. For example, "He arrived late" cannot become "Late was arrived by him" because "arrived" lacks a direct object.
Passive with by simple past is common in academic writing, journalism, and technical manuals. It allows authors to emphasize results over agents.
In research papers, it maintains objectivity. Instead of saying "We conducted the experiment," writers often say "The experiment was conducted." This removes personal pronouns and focuses on the process.
News headlines frequently use it: "A bridge was destroyed by floodwaters." The event is central; the cause (floodwaters) is noted but not emphasized.
According to the Cambridge Grammar of English, passive constructions reduce emphasis on the agent, which helps avoid blame or show unintended consequences (Cambridge University Press, 2002).
Many learners confuse passive with by simple past and the past continuous. The past continuous describes ongoing actions ("She was writing a letter"), while the passive with by simple past describes completed actions with a clear recipient.
A frequent error is omitting "by" when stating the agent. Incorrect: "The painting was sold." Correct: "The painting was sold by the gallery." Omitting "by" changes the meaning-it implies the sale happened without a known actor, which may be misleading.
Another mistake is misusing the past participle. For example, "The door was opened by John" is correct. But "The door was open by John" is incorrect-"open" is an adjective, not a past participle. The correct form requires the past participle "opened."
Also, passive voice is not always better. Overuse leads to wordiness and vagueness. The active voice is clearer when the agent matters. For example, "John broke the vase" is more direct than "The vase was broken by John."
Consider this sentence from a historical report: "The treaty was signed by both leaders on June 12, 1945."
Breakdown:
This construction highlights the document's status rather than the individuals involved. It reflects the formal tone expected in historical texts.
I once reviewed a student paper where they wrote: "The assignment was completed by me." While grammatically correct, it sounded unnatural. Replacing it with "I completed the assignment" improved clarity and voice. Passive is acceptable when the agent is irrelevant-but not when it's obvious and unimportant.
Passive with by simple past differs from other passive forms:
| Form | Use Case | Example |
|---|---|---|
| Simple past passive | Completed actions with known agents | The cake was eaten by the children. |
| Present perfect passive | Actions with relevance to now | The project has been finished by the team. |
| Future passive | Planned future events | The contract will be signed by the CEO. |
Only the simple past passive uses "was/were + past participle" and includes "by" to name the agent.
Most learners assume passive voice is inherently weak or vague. But it serves specific purposes: removing bias, focusing on outcomes, and maintaining formal tone. The presence of "by" makes the agent explicit-unlike passive constructions without "by," which leave the agent unknown.
For example, "The statue was damaged" leaves the cause unclear. But "The statue was damaged by vandals" provides context. The "by" phrase adds accountability.
Mastering passive with by simple past improves reading comprehension and writing precision in formal and academic settings.
Use it when the action matters more than the actor. Avoid it when clarity demands active voice. Always verify the verb's past participle form-especially for irregular verbs.
Now you know how to recognize and construct passive with by simple past correctly.