The teacher said water boils at 100°C. — still true, so the tense doesn't shift.
What you'll learn
Backshift reflects that time has passed since the original words were spoken. But if what's reported is still true — a general fact, an unchanged situation — shifting the tense back can make it sound like it's no longer true. In these cases, backshift is optional, and native speakers often skip it.
A general truth or scientific fact stays true regardless of when it was reported, so the present tense is usually kept, even after a past reporting verb.
If the reporting verb itself is in the present tense ('says', 'has said' — often used for very recent or ongoing reports), the reported verb doesn't need to backshift at all, because there's no time gap to reflect.
For an ongoing situation that's still true at the moment of reporting — a job, a habit, a permanent fact about someone — backshift is often skipped, since shifting the tense could wrongly suggest the situation has ended.
A scientific fact stays true regardless of when it was reported — keep the present tense rather than backshifting.
When the reporting verb itself is present tense, there's no time gap to reflect — don't backshift the reported verb.
If the situation is still true now, backshifting can wrongly suggest it has ended — keep the present tense instead.
"What did you learn in science today?"
"The teacher said the Earth orbits the Sun, and that light travels really fast."
"Anything about the ice experiment?"
"Yeah, she said ice melts at 0°C, but salt water freezes at a lower temperature."
Exercise 1 · Choose the correctly reported sentence
Choose the correctly reported sentence for a general truth: 'Water boils at 100°C.'
Exercise 2 · Choose the correctly reported sentence
Choose the correctly reported sentence, reporting verb in the present: 'I'm tired.' → He says ___.
Exercise 3 · Choose the correctly reported sentence
Choose the correctly reported sentence for a still-true fact told an hour ago: 'I live in Kyiv.'
Exercise 4 · Choose the correctly reported sentence
Choose the correctly reported sentence for a scientific fact: 'The Earth orbits the Sun.'
Exercise 5 · Choose the correctly reported sentence
Choose the correctly reported sentence, reporting verb 'has said' (present perfect): 'I'm coming.'
Exercise 6 · Choose the correctly reported sentence
Choose the correctly reported sentence for a permanent habit: 'I don't eat meat.'
Exercise 7 · Choose the correctly reported sentence
Choose the correctly reported sentence for a text message just read aloud: 'I'm outside.'
Exercise 8 · Choose the correctly reported sentence
Choose the correctly reported sentence for an outdated belief that's no longer true: 'The office is open on weekends.' (it closed weekends last year)
Exercise 9 · Report the timeless fact
Report this timeless fact: 'The sun rises in the east.' → The teacher said the sun ___ in the east.
Exercise 10 · Report with a present-tense reporting verb
Report with a present-tense reporting verb: 'I need help.' → She says she ___ help.
Exercise 11 · Sort into groups
0 / 4 sorted
Five quick questions to check what stuck.
Question 1 / 5
Score: 0/0
Choose the correctly reported sentence for an ongoing situation: 'I work at the hospital.' (still true)
Reported Commands and Requests
Learn how to report imperatives, commands, and polite requests using tell/ask + object + to-infinitive.
Reporting Verbs
Go beyond 'say', 'tell', and 'ask' — learn the fixed grammatical patterns of common reporting verbs like suggest, admit, deny, promise, and warn.
Changes in Time and Place Words
Learn how words like 'today', 'here', and 'this' shift to 'that day', 'there', and 'that' when reporting speech later or elsewhere.
Backshift of Tenses
Learn the full pattern for shifting tenses one step into the past when reporting speech from a past reporting verb.