The document discusses passive sentences and their verb forms compared to active sentences. It explains that passive sentences have the subject receiving the action of the verb rather than performing it. It then provides examples of passive verb forms in different tenses, including with modal verbs. It also introduces the passive causative construction using have or get followed by the past participle.

1. PASSIVES: PART 1
Grammar Explanation

2. COMPARE:
ACTIVE SENTENCES
SUBJECT VERB OBJECT
Cooper hijacked the plane.
Someone found the bills.
Authorities never solve some crimes.
PASSIVE SENTENCES
SUBJECT VERB OBJECT
The plane was hijacked by Cooper
The bills were found.
Some crimes are never
solved =
never get
solved
by authorities.

3. PASSIVE VERB FORMS
Verb Tense Subject Be (not) Past Participle
Simple present
The crime
is (not)
investigated (by the new team).
Present progressive is (not) being
Simple past was (not)
Past progressive was (not) being
Future will (not) be
is (not) going to be
Present perfect has (not) been
Past perfect had (not) been
Future perfect Will (not) have been

4. THE PASSIVE WITH MODALS IN THE PRESENT
Subject Modals Be Past Participle
The case
can (not)
be reopened in the future.
may (not)
might (not)
should (not)
must (not)
had better (not)

5. THE PASSIVE WITH MODALS IN THE PAST
Subject Modals Have been Past Participle
The case
could (not)
have been reopened years ago.
may (not)
might (not)
should (not)
must (not)
ought (not) to

6. THE PASSIVE CAUSATIVE
Subject Have/Get Object Past Participle (by + Agent)
We had the evidence checked by experts.
She has had the note analyzed.
They got the report printed by professionals.
He is going to get a copy made.