The document discusses the active and passive voices in grammar. In the active voice, the subject performs the action of the verb on the object. In the passive voice, the subject receives the action of the verb, and the object of the active sentence becomes the subject of the passive sentence. The passive voice uses a form of the verb "to be" plus the past participle of the main verb, and it always includes "by" to introduce the active voice subject.

1. VOICES OF THE VERB
Active and Passive
Voices

2. Voices of the Verb
 In grammar, the voice of a verb describes the
relationship between the action (or state) that
the verb expresses and the participants
identified by
its arguments (subject, object, etc.).

3. Active Voice
 The active voice is the "normal" voice. This is
the voice that we use most of the time.
 Subject + verb + object
 In the active voice, the object receives the
action of the verb:
Subject Verb  Object
Cats eat fish

4. Passive Voice
 In the passive voice, the subject receives the action
of the verb.
 The structure of the passive voice is very simple:
subject + auxiliary verb (be) + main verb (past
participle)
 The main verb is always in its past participle form.
 We use the passive when we want to make
the active object more important.
 Note that we always use by to introduce
the passive object.

5. Passive Voice
Auxiliary Verb Main Verb
Subject
(to be) (past participle)
Water is drunk by many
100 people are employed by this company

6. Activity I
 Give each picture a description using the
active voice then transform it to passive.