Overview
Warnings in reported speech use warn + object + not to-infinitive or warn + that-clause. Example: 'Don't touch the wire' → He warned them not to touch the wire. 'Warn' can also introduce a that-clause: He warned us that the road was icy.
Warnings → Reported
- warn + not toHe warned me not to touch the wire.
- warn + thatShe warned that the road was dangerous.
- Direct'Don't go near the edge,' she said.
- ReportedShe warned us not to go near the edge.
Warning Reporting Verbs
- warn+ object + not to-infinitive
- caution+ object + about / against + -ing
- alert+ object + to + noun
- advise+ object + against + -ing
Common Mistakes
- ❌ She warned me to not go there.
- ✅ She warned me not to go there.
- ❌ He warned that don't cross the line.
- ✅ He warned us not to cross the line.
When to use
Safety
The sign warned drivers not to exceed 60 mph.
Medical
The doctor warned him to avoid alcohol.
Formal email
She cautioned us about the risks of the investment.
School
The teacher warned the students not to cheat.