This document discusses the use of modal verbs in English grammar. It provides a table that lists different modal verbs and their common uses for ability, possibility, permission, requests, lack of obligation, deduction, prohibition, advice, offers, and suggestions. It then explains what a modal passive construction is, how it is used to convey factual or objective information, and provides the formula and examples of affirmative, negative, and question sentences using modal passives.

1. Modal Passive
Grammar 5
Student: Yenny Pérez
Teacher: Ramón Guerra

2. Modal Verbs
USE
MODALS
ABILITY Can Could (past)
POSSIBILITY
Can
(general or theoretical )
Could
May
Might
(less probablethan
may)
PERMISSION
Can May
(formal)
REQUEST
Can /
Could
Will
(formal)
May
(formal)
Would
(formal)

3. Modal Verbs
USE
MODALS
LACK OF
OBLIGATION
Don’t have to Needn’t
DEDUCTION /
CONCLUSION
Must
Should
(less certain)
Can’t
PROHIBITION Mustn’t Can’t May not
ADVICE
Should
Ought to
Might
Could
OFFER
Shall
Would
SUGGESTION
Shall
Would
Should
(formal)

4. Modal Passive
 Meaning and Use:
 Factual information.
 Objective or impersonal tone.
 Books / Articles / News Headlines / Announcements / Signs /
Rules.
 Formula:
 MODAL + BE + PAST PARTICIPLE (+ BY + NOUN)
 The report must be written by the students.

5. Modal Passive
 Affirmative sentence:
 The office must be cleaned today.
 Negative Sentence:
 The office shouldn’t be cleaned today.

6. Modal Passive
 Yes/No Question:
 Could the office be cleaned?
 Information Question:
 When can the office be cleaned?

7. Thanks for listening!