did
A1 (Extremely High)Universal (Neutral) - Used in all registers from formal to informal.
Definition
Meaning
Past tense of 'do'. Used to form questions, negatives, and emphatic statements in the simple past tense, and to refer to a completed action or state in the past.
Also functions as a pro-verb to avoid repetition ('I liked it.' 'So did I.'). Can be used for emphasis in affirmative statements ('I did tell you!').
Linguistics
Semantic Notes
"Did" is a grammatical auxiliary (helping verb) and a main verb. As an auxiliary, it carries no lexical meaning but signals past tense, questions, or negation. As a main verb (replacing a previous verb), it inherits the meaning of the verb it substitutes.
Dialectal Variation
British vs American Usage
Differences
Minimal to none in core usage. Potential minor variation in informal tag questions (BrE: 'You did, didn't you?', AmE: 'You did, right?').
Connotations
Identical.
Frequency
Identical. An essential, extremely frequent function word in both dialects.
Vocabulary
Collocations
Grammar
Valency Patterns
AUX + subject + base verb (Did she go?)AUX + not/n't + base verb (He did not see.)Subject + AUX + base verb (We did finish.)Pro-verb: So/Neither + AUX + subject (So did I.)Vocabulary
Synonyms
Strong
Neutral
Weak
Vocabulary
Antonyms
Phrases
Idioms & Phrases
- “What did I tell you?”
- “Easier said than done.”
- “That does it!”
Usage
Context Usage
Business
Used in reporting past actions: 'The team did complete the analysis on time.'
Academic
Used in constructing past tense research questions: 'How did the variable affect the outcome?'
Everyday
Ubiquitous in past narrative and questions: 'What did you do yesterday?' 'I did the shopping.'
Technical
Used in procedural documentation: 'The system did not respond to the initial command.'
Examples
By Part of Speech
verb
British English
- He did the washing-up.
- She did a brilliant job on the project.
- They did their homework at the library.
American English
- He did the dishes.
- She did an amazing job on the project.
- They did their homework at the library.
adverb
British English
- N/A for 'did' as an adverb.
American English
- N/A for 'did' as an adverb.
adjective
British English
- N/A for 'did' as an adjective.
American English
- N/A for 'did' as an adjective.
Examples
By CEFR Level
- I did my homework.
- Did you like the film?
- He didn't come to the party.
- What did you decide in the end?
- She did tell me, but I forgot.
- They did not receive the invitation on time.
- Had I known, I would have done it differently, which is precisely what she did.
- Not only did he apologise, but he also offered a full refund.
- Little did they realise the consequences of their action.
- So compelling was the evidence that the jury did, in fact, deliver a swift verdict.
- What the research did was challenge a decades-old paradigm.
- Never before had the company done so well, nor did it again.
Learning
Memory Aids
Mnemonic
DID = Directly In the past. It's the simple past helper for DO.
Conceptual Metaphor
TIME IS SPACE (A POINT ON A PATH): 'Did' places an action at a specific, completed point on the timeline.
Watch out
Common Pitfalls
Translation Traps (for Russian speakers)
- Avoid using 'did' with a past tense verb (e.g., 'I did went' is wrong).
- Remember that in questions/negations, 'did' takes the base form of the main verb, not the infinitive with 'to'.
- The emphatic 'did' (I did call!) has no direct equivalent in Russian and is often underused by learners.
Common Mistakes
- *Did you went? (Correct: Did you go?)
- *I didn't went. (Correct: I didn't go.)
- *Yes, I did it. (As a pro-verb, often unnecessary: 'Did you finish?' 'Yes, I did.' not 'Yes, I did it.')
Practice
Quiz
Which sentence uses 'did' correctly as an emphatic auxiliary?
FAQ
Frequently Asked Questions
Use 'did' for actions and general states in the simple past ('I did my work', 'She did not like it'). Use 'was/were' for descriptions, locations, and the past continuous tense ('I was tired', 'They were at home', 'He was running').
It's the main verb in the simple past. 'Did' is the auxiliary for the past tense question. This is different from 'Had you had breakfast?', which is the past perfect.
It's a pro-verb. It substitutes for the entire previous verb phrase to avoid repetition. 'So did I' means 'I also [did the aforementioned action]'.
Yes, absolutely. While it is ubiquitous in speech, it is also standard and correct in all forms of written English, including academic and technical writing, for forming past tense questions, negatives, and for emphasis.