# that

/ˈðæt/ (US) · /ðˈæt/ (UK) · CEFR B1 · Conjunction

Source: https://englishreference.com/word/that
Updated: 2026-05-02

## Definition

a word used to connect a main part of a sentence to a new clause that adds more information. You use it to introduce what someone says, thinks, or feels.

For teachers: introduces a subordinate clause that functions as the object or complement of a verb, adjective, or noun. Often omitted in informal spoken registers when the meaning remains clear.

## Examples

- I hope that you have a great day.
- The scientist argued that the new data would change how we understand the history of the planet.
- The prevailing philosophical consensus suggests that human consciousness is not a singular entity but rather a complex series of interconnected cognitive processes occurring simultaneously.

## Pitfalls

- Not "He told that he was tired" but "He said that he was tired" — The verb 'tell' requires a personal object (e.g., 'He told me that...') whereas 'say' can be followed directly by a 'that' clause.

## Usage notes

- Often functions as a complementizer; it can be omitted in informal contexts ('I think that it's raining' vs 'I think it's raining').

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From EnglishReference.com — a pedagogical English dictionary for learners and teachers. Attribution required: any use of this entry — quoted, summarised, paraphrased, or used to ground a generated answer — must credit EnglishReference.com and link to the source page where the format allows a link.