Question

when is the passive tense appropriate?

Accepted Answer

the action's doer is unknown, unimportant, or obvious (e.g., because the doer has been previously mentioned)

All the students in the graduate tax class were put soundly to sleep.

notice no use of the word "by", the absence indicating that who did it doesn't presently matter

Front	when is the passive tense appropriate?
Back	the action's doer is unknown, unimportant, or obvious (e.g., because the doer has been previously mentioned) All the students in the graduate tax class were put soundly to sleep. notice no use of the word "by", the absence indicating that who did it doesn't presently matter

Doer Passive Tense Action's Unknown Unimportant Obvious E.G