Be used in the example above is had. Both of singular and plural subject.
c. The Passive Voice with Modal Auxiliaries
Someone can use modal auxiliary will, can, must, may in the passive construction. Be is added after modal and past participle follows after it.
Here are the formulations of passive voice construction with modal auxiliary.
1 Subiect+Modal Auxiliarv+be+ past participle. affirmative sentence 2 Subiect + Modal Auxiliarv+ not + be + past participle. Negative sentence
3 Modal Auxiliary + subiect + be + past participle? interrogative sentence
Here are some examples of passive voice with modal auxiliary : 1 Tom will be invited to the picnic.
2 The window cant be opened 3 May I be excused from class ?
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d. The Passive Voice with Two Objects
Fairly common verbs have two objects, a direct object usually a thing and an indirect object usually a person. If the direct object is placed before the
indirect, they are joined by the preposition to occasionally for
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Here is the example: He gave a book to his brother.
In the sentence above, there are two objects, which are a book and his brother. A book is as a direct object and his brother as an indirect object.
21
Betty Schramfer Azar, Understanding and Using English Grammar, 2
nd
ed., New Jersey: Prentice-Hall Inc., 1989, p. 130
22
W. Stannard Allen, Living English Structure for schools, London : Longman, 1958, p.150
When the verb is used in the passive, it becomes : A book was given to his brother.
If the indirect object is placed first, no preposition is needed to join it. Here is the example:
He gave his brother a book. In the sentence above, there are two objects, which are his brother as an
indirect object and a book as a direct object. When the verb is used in the passive, it becomes :
His brother was given a book. According to W. Stannard Allen, in the passive voice it is more usual to
make the indirect objects the subject of the passive perhaps because we have a greater interest in persons than things. If the direct object is of special interest, it
can also become the subject of the passive voice, the preposition to or for being retained
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.
e. Stative Passive