In English we have two forms of grammar:
The Passive Subject + Be +Past Participle +by the agent
The Passive is a useful tense and we have many reasons why we use it.
- We do not know who did the action.
- We do not care who did the action.
- It is clear who did the action
- In formal writing
- The object is more important at the time of speaking.
It is important to understand how the Passive works.
Let us look at Active
Yesterday a dog bit a man. = ACTIVE sentence
Why is it active? Two reasons.
- Who did the verb? That is right, the dog.
THE SUBJECT DID THE VERB
- The verb tells us when it happened.
Let us compare
A man was bitten by a dog. = PASSIVE sentence
Who did the verb? That is right, the dog.
Hang on! The dog is not the subject! So it is passive.
We also have to add ‘BE’ Verb to show the tense.
*Common ‘BE’ verbs
- Present simple = is/are +Past Participle
- Past Simple = was/were +Past Participle
- Present continuous = was/were being + Past Participle
- Future simple = will + be + Past Participle