Promises should be kept.
If you want to you can add by one. But this is not necessary.
Using 'one' is a bit formal it would be better to use 'people'.
Promises should be kept by people.
Their promises should be kept
Active voice is much better than passive voice in writing.
He teaches us english- change the voice
This sentence can't be changed into a passive voice.
you
change into active voice this essay was written by him
You can't: there is no passive form of this verb--just as there is no passive form of the verb "to go". Why? Because in order to have a passive voice, the verb in question must be transitive: i.e., take an object. You can't should a thing, or go a thing. But you can, for instance, stroke a thing. So you can say that the thing is/was stroked--passive.
Can it be changed into passive voice?
In passive voice, one possible sentence would be "the poor should not be hated".
The hammer might have hit him to change into his passive voice.
A noise should not be made.
== == "English grammer active and passive voice change from active to passive .
Active voice is much better than passive voice in writing.
He teaches us english- change the voice
Passive is to change as active is to act. In passive voice, the subject of the sentence receives the action, while in active voice, the subject performs the action.
This sentence is in passive voice. To change it to active voice, you could say "Five dollars were present."
This sentence can't be changed into a passive voice.
The passive voice for "I have done it well" is "It has been done well" or "It was done well."