Perhaps you get surprised when I give a strange title like, "Passivator". Let me tell you that Passivater, here, is words that can be a determiner to make a passive form.
1. Modal Auxilliary.
When you make a sentence which contains a modal auxilliary in it, you can make a passive form by Adding /be/ (not, say, is,am,are,was,were) and the third verbs.
Study this follows!
MODAL AUX. + BE + PAST PARTICIPLE
For examples:
You may be deceived by him.
He can be accused for what he did a week ago.
Some people should be informed the updated news.
Students must be educated comprehensively.
2. To
/To/ is one of prepositions in English. When we read or write it, we will place an infinitive or adverb of place after /to/. Read more ....
For examples:
I want to know about it.
They went to Chicago yesterday.
In this case, /To/ is as a determiner of passive form or becomes passivator.
TO + BE + PAST PARTICIPLE
For examples:
She needs to be assisted.
The old man started to be interviewed.
3. Have or Has
Have or has is a bare-infinitive. When it is used in Causative "Have/Get", this can make a passivator.
SUBJECT + HAVE/HAS + DIRECT-OBJECT + PAST PARTICIPLE
For examples:
I have my car repaired.
Linda has her books given back.
ADDITION : STATIVE PASSIVE
Stative passive is a kind of passive which doesn't need an Object after that. Why? It is because the object has been understood or understadable.
For examples:
1.The door was locked.
2.The rice is planted.
In first sentence, we know that the door must be locked by a man (human ...). This means that the sentence is already understood and doesn't need the expression or phrase like, /by him/.
In second sentence, we know that the rice must be planted by the farmer. It is impossible if an engineer does it even though he or she can plant or do the work. But, when the engineer works and plants rice in his/her rice field, people say that he or she is a farmer, not an engineer, right? Good!