Structure of passive tenses

Structure of passive forms
positive	negative	question
The office is cleaned* twice a week.*	The office isn't* (is not) cleaned twice a week.*	Is the office cleaned* twice a week?*
The office is being cleaned* at the moment.*	The office isn't* (is not) being cleaned at the moment.*	Is the office being cleaned* at the moment?*
The office has* already been cleaned.*	The office hasn't* (has not) been cleaned yet.*	Has the office been cleaned?
The office will be cleaned* next week.*	The office won't* (will not) be cleaned next week.*	Will the office be cleaned next week?
The office can be cleaned.	The office cannot* (can't) be cleaned.*	Can the office be cleaned?
When we want to include the agent (who), we use a prepositional phrase with by: The play was written by* Oscar Wilde.*

Passive forms – common mistakes
Common mistakes	Correct version	Why?
This problem will solved next week.	This problem will be solved next week.	To make a passive form we use be + past participle.
This problem will be solve next week.	This problem will be solved next week.	To make a passive form we use be + past participle.
My car is repairing at the moment.	My car is being repaired at the moment.	To make a passive form of a continuous tense we use be + being + past participle.
She has be invited.	She has been invited.	To make a passive form of the perfect tense we use have/has/had + been + past participle.

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