Reported speech with modal verbs — englishillustrated.com

Understanding Modal Verbs in Reported Speech

When we report what someone said using reported speech, modal verbs often change to maintain the correct tense relationship. The key principle is backshifting: we move the modal verb back one tense level to show that the original statement was made in the past. Some modals change, while others remain the same. Understanding these transformations helps you report speech accurately and naturally.

Modal Verbs That Change

The most common modal verbs shift backward: 'can' becomes 'could', 'will' becomes 'would', 'may' becomes 'might', and 'must' becomes 'had to'. These changes reflect the past perspective of reported speech. However, 'should', 'could', 'might', 'ought to', and 'would' typically don't change because they already have a past or conditional quality. The context and the reporting verb you choose (said, told, mentioned) remain the same.

Special Cases and Practical Notes

When the reported speech refers to something that is still true or a permanent fact, you can choose not to backshift the modal: 'She said that water boils at 100 degrees' works just as well as backshifting. Additionally, if the reporting clause uses present tense (such as 'He says that...'), the modal in the reported clause doesn't change. Pay attention to the reporting situation to decide whether backshifting is necessary or sounds more natural.

Modal Verb Changes in Reported Speech

Direct Speech Modal Verb	Reported Speech Equivalent
can "I can help you."	could She said she could help me.
will "I will call you tomorrow."	would He said he would call me the next day.
may "She may arrive late."	might He said she might arrive late.
must "You must finish this today."	had to (obligation) / must (logical deduction) She said I had to finish it that day. / He said it must be true.
shall "I shall return."	would He said he would return.
should "You should see a doctor."	should (no change) She said I should see a doctor.
could "I could swim when I was young."	could (no change) She said she could swim when she was young.
might "It might rain later."	might (no change) He said it might rain later.
would "I would love to come."	would (no change) She said she would love to come.
ought to "You ought to apologise."	ought to (no change) He said I ought to apologise.

Key Difference: Modal verbs that already express past or hypothetical meaning — could, might, would, should, ought to — do not change in reported speech because they have no further "past" form to backshift into. In contrast, present-oriented modals — can → could, will → would, may → might, shall → would — backshift one step into their past equivalents. The special case is must: when expressing obligation it backshifts to had to, but when expressing logical deduction it stays as must.

Formula

Direct speech + : + Subject + can/will/may/must + verb

Direct: 'I can speak French.'

Examples

Direct: 'I can help you tomorrow.' Reported: She said she could help me the next day.

Modal shift for ability · Most common transformation

Direct: 'You will succeed.' Reported: He told me that I would succeed.

Modal shift for future prediction · Formal contexts

Direct: 'You may leave early.' Reported: The manager said that I might leave early.

Modal shift for permission · Polite usage

Direct: 'You must finish this today.' Reported: She told him he had to finish it that day.

Modal shift for obligation · Common in instructions

Direct: 'I should call my mother.' Reported: He said he should call his mother.

Modal that doesn't change · Advice or duty

Direct: 'You might be late.' Reported: She mentioned that I might be late.

Modal that doesn't change · Possibility

When to use it

Business Communication

When reporting what colleagues or clients said in meetings or emails, modal verbs help convey obligations and possibilities accurately.

"The client said that they would need the report by Friday."

Academic Writing

In essays and research papers, you report what sources or experts have said using correctly backshifted modals.

"The researcher stated that the findings could influence future policy."

Everyday Conversation

When telling friends or family what someone else said, you naturally use reported speech with modal shifts.

"My teacher said that I could improve my writing if I practiced more."

News and Media

Journalists use reported speech with modals to convey statements from officials without direct quotes.

"Officials announced that restrictions might be relaxed next month."

Signal words

said told mentioned explained claimed announced stated reported according to insisted promised admitted

Common Mistakes

Wrong

She said that she can help me with the project.

✓

Correct

She said that she could help me with the project.

Modal 'can' should backshift to 'could' in reported speech from a past reporting verb.

Wrong

He told me that I will pass the exam.

✓

Correct

He told me that I would pass the exam.

Modal 'will' becomes 'would' after a past reporting verb like 'told'.

Wrong

She mentioned that I may attend the meeting.

✓

Correct

She mentioned that I might attend the meeting.

Modal 'may' shifts to 'might' to reflect the past perspective of reported speech.

Wrong

They said that they must arrive before noon.

✓

Correct

They said that they had to arrive before noon.

'Must' doesn't exist as a past form, so use 'had to' in reported speech.

KEY TAKEAWAYS

What to Remember

Use backshifting to move modal verbs back one tense level in reported speech.
Can becomes could, will becomes would, and may becomes might when reporting past statements.
Some modals like must, should, and ought to often remain unchanged in reported speech.
Modal verbs shift to maintain correct tense relationship between the reported clause and reporting verb.
Always consider the original speaker's intention when choosing whether to backshift certain modal verbs.

← Previous

Reported speech — time and place word changes

Reported speech — 40 examples