Past Simple Negatives and Questions in English

In Brief

Use didn't + base verb for most past simple negatives: She didn't call. Use Did + subject + base verb? for most questions: Did she call? Because did already marks the past, never put the main verb in the past after did or didn't: say didn't go, not didn't went.

Overview

The past simple describes actions, events, and situations viewed as finished in the past. Positive sentences put the main verb in a past form: We played, I saw her, Sam left early. To make most of these sentences negative or turn them into questions, English introduces the helping verb did.

A helping verb, also called an auxiliary verb (a verb that carries grammatical information for another verb), marks the sentence as past. The meaningful action then appears as a base verb: the plain dictionary form without to, such as play, see, or leave. This division of work is the central idea: did shows past time, while the base verb names the action.

This is a core A2 pattern for discussing finished experiences: what you did not do, whether something happened, and when or why it happened. The beginner rule is very regular, even with irregular verbs. One important exception is be, which uses was and were without did.

How It Works

The basic patterns

Sentence type	Structure	Example
Positive	subject + past verb	They watched the match.
Negative	subject + did not / didn't + base verb	They didn't watch the match.
Yes/no question	Did + subject + base verb?	Did they watch the match?
Question with a question word	question word + did + subject + base verb?	Where did they watch the match?

The subject is the person or thing that performs the action or is being described. In Maya opened the window, Maya is the subject. The base form is open, so the negative is Maya didn't open the window and the question is Did Maya open the window?

Did is used with every subject. There is no special form for he, she, or it.

Subject	Negative	Question
I	I didn't call.	Did I call?
you	You didn't call.	Did you call?
he / she / it	She didn't call.	Did she call?
we	We didn't call.	Did we call?
they	They didn't call.	Did they call?

Negatives with did not and didn't

Did not is the full form; didn't is its contraction (a shortened form with an apostrophe). Both are correct.

• I did not understand the instructions.
• I didn't understand the instructions.

The contraction is normal in conversation and most everyday writing. The full form can sound more formal or more emphatic: I did not agree to that. In both versions, place not with did, not after the main verb.

This pattern works with regular and irregular verbs alike:

Positive	Negative
She worked late.	She didn't work late.
He knew the answer.	He didn't know the answer.
We went by train.	We didn't go by train.
They had enough time.	They didn't have enough time.

The past forms worked, knew, went, and had return to work, know, go, and have. Do not add another past marker to the main verb.

Yes/no questions and short answers

A yes/no question can naturally be answered with yes or no. Put Did before the subject:

• Statement: Leo booked the tickets.
• Question: Did Leo book the tickets?

In a short answer, repeat did, not the main verb:

Question	Positive short answer	Negative short answer
Did you finish?	Yes, I did.	No, I didn't.
Did Anna call?	Yes, she did.	No, she didn't.
Did they arrive?	Yes, they did.	No, they didn't.

A bare Yes or No may be enough in casual conversation, but the short answer often sounds clearer and more engaged. Do not answer Yes, I finished unless you want a full answer; Yes, I did is the standard short form.

Questions with who, what, where, when, why, and how

When a question asks for missing information, put the question word first. If the question word is not the subject, follow it with did + subject + base verb:

• Where did they go?
• When did the meeting start?
• Why did you leave?
• How did she find us?
• What did he buy?
• Who did you invite?

A question word can be followed by a longer phrase: What time did you arrive? How many people did they invite? Which bus did she take? The order after that phrase remains did + subject + base verb.

The special case of subject questions

Sometimes who or what is itself the subject—the unknown person or thing performed the action. In that case, do not use did:

• Who called you? — Someone called; who asks for that person.
• What happened outside? — Something happened; what asks for that thing.

Compare these two meanings:

Question	What is unknown?	Structure
Who saw Maya?	the person who saw Maya	who + past verb
Who did Maya see?	the person Maya saw	who + did + subject + base verb

In the second question, Maya is the subject, so did is required. This distinction is a later refinement; at first, learn the common question word + did + subject + base verb pattern.

The verb be: was and were

Past forms of be do not use did. Put not after was or were, and move was or were before the subject in questions.

Positive	Negative	Question
I was tired.	I wasn't tired.	Was I tired?
She was at home.	She wasn't at home.	Was she at home?
They were ready.	They weren't ready.	Were they ready?

Say Was he late?, not Did he be late? The negative contractions are wasn't and weren't.

Examples in Context

English example	Meaning in plain English	Note
I didn't go to work yesterday.	I did not attend work yesterday.	Irregular went becomes base-form go.
She didn't know the answer.	The answer was unknown to her.	Irregular knew becomes know.
We didn't order dessert.	We chose not to get dessert.	Regular verb in a negative.
The train didn't arrive on time.	The train arrived late.	Didn't is the same with the subject train.
Did you see him at the station?	I am asking whether you saw him there.	Yes/no question with see.
Did Maya send the email?	I am checking whether Maya sent it.	A named person can be the subject.
Did they have a good trip?	I am asking about their experience.	Past had becomes base-form have.
Where did they go after dinner?	I am asking about their destination.	Question word before did.
Why didn't you call me?	I am asking for the reason you did not call.	Negative question with why.
What time did the film end?	I am asking for the finishing time.	A question phrase comes first.
Who opened the door?	I am asking which person opened it.	Subject question: no did.
Who did you meet at the conference?	I am asking which person you met.	You is the subject, so use did.
Was the café busy?	I am asking about the café's past state.	Be uses was, not did.
No, we didn't.	We did not do the action just mentioned.	Standard negative short answer.

Common Mistakes

Using a past verb after did or didn't

• Wrong: I didn't went to work.
• Right: I didn't go to work.
• Why: Didn't already marks the past. The main verb must be the base form.

This applies to regular verbs too: say Did she work?, not Did she worked?

Forgetting did in an ordinary question

• Wrong: You saw him yesterday?
• Right: Did you see him yesterday?
• Why: Standard neutral questions normally need did before the subject. A statement-shaped question can occur informally when expressing surprise or checking information, but it is not the basic pattern.

Changing did for he, she, or it

• Wrong: Does she call you last night?
• Right: Did she call you last night?
• Why: Did is the past form for every subject. Does belongs to the present simple.

Putting not in the wrong place

• Wrong: She did call not.
• Right: She did not call. / She didn't call.
• Why: In a standard negative, not follows the auxiliary did and comes before the main verb.

Using did with be

• Wrong: Did they be tired? / They didn't be tired.
• Right: Were they tired? / They weren't tired.
• Why: Be forms its own past questions and negatives with was and were.

Using did in a subject question

• Wrong: Who did call you? (neutral request for the caller's identity)
• Right: Who called you?
• Why: When who is the subject, use the past verb directly. Who did call you? is possible only as unusual emphasis or contrast, not as the neutral beginner pattern.

Usage Notes

Choosing between didn't and did not

Didn't is natural across informal speech, messages, and ordinary prose. Did not is more frequent in formal documents and useful when strongly correcting someone: I did not delete the file. In speech, emphasis normally falls on not.

Negative questions

A negative question uses didn't before the subject or did + subject + not:

• Didn't you get my message?
• Did you not get my message?

The first is much more common in conversation. Negative questions often show that the speaker expected something to be true, or they express surprise. Didn't you enjoy the film? may suggest that the speaker thought you enjoyed it. Because yes and no can become confusing, answer clearly: Yes, I enjoyed it or No, I didn't enjoy it.

Speaking and pronunciation

In normal speech, did you often runs together and may sound roughly like “didja.” Learners do not need to imitate this immediately, but recognizing it makes listening easier. In careful writing, always write did you, not didja, unless deliberately representing very informal speech.

Beyond the Basics / Advanced Use

You do not need to master these points at A2, but you will meet them later.

Emphatic did in positive statements

A positive past statement normally has no did: I sent the form. However, did + base verb can add emphasis, especially to correct a doubt or contrast with another idea:

• I did send the form—check your inbox again.
• She didn't finish the report, but she did start it.

Here did is stressed. The main verb still stays in the base form.

Indirect questions

A direct question uses question order: Where did he go? After introductory phrases such as Do you know…? or Can you remember…?, the embedded part uses statement order:

• Direct: Where did he go?
• Indirect: Do you know where he went?

Do not say Do you know where did he go? In the indirect version, there is no question inversion inside where he went, so the main verb carries the past form again.

Other auxiliary and modal verbs

The did pattern is for ordinary lexical verbs (verbs that carry the main meaning), such as work, know, and leave. If a clause already has a modal helping verb such as could or would, it does not add did: Could she swim? She couldn't swim. This belongs to the wider English auxiliary system, but the practical principle is useful: do not stack did in front of another past modal.

Practice Tips

1. Transform one sentence three ways. Start with a positive sentence such as They bought lunch. Make the negative (They didn't buy lunch), the question (Did they buy lunch?), and a short answer (No, they didn't). Practise with both regular and irregular verbs.
2. Circle the past marker. In every negative or question, identify did/didn't, then check that the following main verb is plain: take, not took; study, not studied.
3. Separate be from other verbs. Make two small sets of cards: Did she work? / She didn't work and Was she busy? / She wasn't busy. This prevents the most common pattern mix-up.

Related Concepts

• Prerequisite: Past Simple Regular Verbs — learn how positive past simple forms are built before turning them into negatives and questions.