Passive Sentences

Today I ate a snake.
Yesterday I ate a snake.
I've been eating a snake.
Now you are eating a snake.
^ ^
You will not understand what I mean. You should learn first passive sentence. New you will understand what I mean ^ ^.

Passive voice verbs are used in writing much more often than in speech, and they are used in some types of writing much more often than in others. Passives are used more in journalism (newspapers, magazines) than in fiction (novels, stories), but most journalists and fiction writers use far more active than passive sentences. However, passives are very common in all types of scientific and technical writing. Scientific articles often contain more passive than active sentences. You should not use passive voice verbs unless you have a good reason.

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A. Relationship between active and passive:
1. The object of the active verb is the subject of the passive verb (“English” in the example sentences below). Therefore, verbs which cannot be followed by objects (intransitive verbs) cannot be used in passive voice.
These are some common intransitive verbs: appear, arrive, come, cry, die, go, happen, occur, rain, sleep, stay, walk. These verbs cannot be used in passive voice.
2. The passive verb always contains a form of the auxiliary verb be. The form of be in the passive verb phrase corresponds to the form of the main verb in the active verb phrase (see the underlined words in the example sentences below). That is, if the active main verb is simple present tense, then a simple present tense form of be is used in the passive verb phrase; if the active main verb is -ING, then the -ING form of be is used in the passive verb phrase; and so on.
3. The main verb in a passive predicate verb phrase is always the participle form of the verb.
4. Some examples of active and passive sentences:
ACTIVE: They speak English.
PASSIVE: English is spoken.
ACTIVE: They spoke English.
PASSIVE: English was spoken.
ACTIVE: They will speak English.
PASSIVE: English will be spoken.
ACTIVE: They are going to speak English.
PASSIVE: English is going to be spoken.
ACTIVE: They are speaking English.
PASSIVE: English is being spoken.
ACTIVE: They were speaking English.
PASSIVE: English was being spoken.
ACTIVE: They have spoken English.
PASSIVE: English has been spoken.
ACTIVE: They had spoken English.
PASSIVE: English had been spoken.
ACTIVE: They will have spoken English.
PASSIVE: English will have been spoken.
5. Perfect progressive verb forms are generally used in active voice only. That is, these are good English sentences:
ACTIVE: They have been speaking English.
ACTIVE: They had been speaking English.
ACTIVE: They will have been speaking English.
But sentences like these are rarely used:
PASSIVE: English has been being spoken.
PASSIVE: English had been being spoken.
PASSIVE: English will have been being spoken.