What is the fom of passive voice?

Answer 1

Passive is formed with be verb + past participle

present simple active = eat / asks. passive = is eaten / is asked

past simple active = ate /asked. passive = was eaten / was asked

present continuous active = is eating / are asking. passive = is being eaten / are being asked

past continuous active = was asking / were eating. passive = was being asked / were being eaten

present perfect active = has asked / have eaten. passive = has been asked / have been eaten.

past perfect active = had asked / had eaten. passive = had been asked / had been eaten

In active sentences the subject or actor (the doer of the action of the verb) comes at the before the verb eg:

The dog chased the cat.

In this sentence the dog is the doer of the action 'chased'.

Passive sentences allow us to put some thing else that is not the subject in the position of the subject eg:

The cat was chased (by the mouse). The actor/agent 'by the mouse' - can be left out

Answer 2

The passive voice is formed by using a form of "to be" (such as is, are, was, were) followed by the past participle of the main verb. This construction shifts the focus from the subject performing the action to the action itself.