Questions and negatives with do
El inglés forma las preguntas y las negaciones con un verbo auxiliar, y cuál necesitas depende de lo que ya tenga la afirmación. Aquí trabajas la inversión con be y con los modales y el uso de do/does/did.
Aprendizaje rápido
El inglés forma las preguntas y las negaciones con un verbo auxiliar, y cuál necesitas depende de lo que la afirmación ya tenga.
Recuerda
- Una afirmación con be o con un modal se invierte sola: she is late → is she late.
- Todo lo demás toma prestado do, does o did.
- En cuanto aparece un auxiliar, el verbo principal vuelve a su forma base.
Ejemplos
- 1Do you drink black tea or fresh coffee in the early morning?
- 2Does your brother live in central London or in suburban Manchester?
Error común que evitar
did ya marca el pasado, así que el verbo que va detrás está en present: did you go, no did you went.
Profundiza
La regla
Start with the verb type
Forming questions and negatives in English is a systematic process governed by verb classification. The first step is identifying what kind of verb the affirmative statement contains:
With be
(1) Sentences with the Verb BE (am, is, are): Negatives: Add not directly after be.
- I am not ready
- He is not at home
- They are not tired
Questions: Invert the subject and be.
- Are you ready?
- Is he at home?
No auxiliary do is used.
With modal verbs
(2) Sentences with Modal Verbs (such as CAN): Negatives: Add not.
- She cannot swim
- We can't come
Questions: Invert the subject and can.
- Can you swim?
No auxiliary do is used.
With every other verb: do
(3) Sentences with Lexical Action Verbs (Do-Support): Main action verbs cannot invert on their own and cannot attach not directly (saying "I work not" or "Like you apples?" is incorrect). They must borrow the auxiliary verb DO or DOES: Negatives: Subject + do not (don't) / does not (doesn't) + BARE BASE VERB:
- I don't drink coffee
- He doesn't eat seafood
Questions: (Wh- word) + DO / DOES + Subject + BARE BASE VERB?: Yes/No Questions:
- Do you work here?
- Does she live in Rome?
Wh- Questions:
- Where do they study?
- What time does the lesson start?
The golden rule
The Golden Rule: The auxiliary does or doesn't already carries the third-person singular inflection. Therefore, the lexical main verb always reverts to its bare dictionary base form without -s ("He doesn't like", never "He doesn't likes").
Anatomía de la frase
Frases de esta lección, separadas en sus partes en el orden que exige el inglés.
Verbo auxiliarDoSujetoyouVerbodrinkObjetoblack tea or fresh coffeeTiempoin the early morning?
Palabra interrogativaWhyVerbo auxiliardoesSujetothe university libraryVerbocloseTiemposo early on Friday afternoons?
VerboIsSujetoyour motherComplementoa registered doctorLugarat the regional public hospital?
SujetoMartinVerbo auxiliardoesNegaciónnotVerbodriveLugarto workOraciónbecause the downtown traffic is terrible.
Guía visual
How to read this A1 topic
At A1, aim for one clear sentence: subject, verb, agreement, and a simple complement.
1. Find the subject
English normally needs an explicit subject before the verb.
It is cold.
2. Check the verb form
Be, have, and third-person -s carry a lot of early grammar.
She works here.
3. Keep a model sentence
Learn one short pattern and swap the words carefully.
I am a student.
Decision path before answering
Use these checks before choosing between close options.
- 1Mark the subject, main verb, object, and any connector.
- 2Underline the time expression or discourse clue.
- 3Reject any option with the wrong agreement, tense, article, pronoun case, or word order.
- 4Read the whole sentence once more for naturalness and register.
Contrasts that often decide the answer
Event or background
Simple forms move events forward; continuous forms show an action in progress.
I left while she was talking.
Fact or stance
Modals, hedges, and reporting structures show how certain or responsible the speaker sounds.
This may indicate a problem.
Clause or compressed phrase
Advanced writing often compresses full clauses into participle, noun, or prepositional phrases.
Having reviewed the data, we revised the plan.
Ejemplos
- 1Do you drink black tea or fresh coffee in the early morning?
- 2Does your brother live in central London or in suburban Manchester?
- 3Where do your grandparents usually spend the warm summer months?
- 4Why does the university library close so early on Friday afternoons?
- 5I do not understand this complicated grammar exercise at all.
- 6Martin does not drive to work because the downtown traffic is terrible.
- 7Are they ready to start the project presentation in the main hall now?
- 8Is your mother a registered doctor at the regional public hospital?
- 9Can you play the acoustic guitar or do you prefer the piano?
- 10What time do you usually wake up on Saturday and Sunday mornings?
Excepciones
Subject Questions: When an interrogative word like who or what serves as the subject of the clause (the entity actually performing the action), do not insert do, does, or did. The sentence maintains standard affirmative word order: "Who lives in that house?" (not "Who does live in that house?"); "What happened here yesterday?" (not "What did happen?"). Preposition Stranding: In natural modern English, prepositions stay at the end of questions: "Who are you waiting for?", "What are you listening to?".
Errores frecuentes
Inverting action verbs directly without do
Error
Speak you English?
Correcto
Do you speak English?
Action verbs require do/does.
Retaining third-person -s after does/doesn't
Error
Where does he works?
Correcto
Where does he work?
The main verb returns to bare base form.
Inserting do into questions with be
Error
Do you be hungry?
Correcto
Are you hungry?
Be inverts directly on its own.
Repaso
Lo esencial de la lección en una tarjeta, antes de ponerte a prueba.
Recuerda
- Una afirmación con be o con un modal se invierte sola: she is late → is she late.
- Todo lo demás toma prestado do, does o did.
- En cuanto aparece un auxiliar, el verbo principal vuelve a su forma base.
Errores frecuentes
Error: Speak you English?
Correcto: Do you speak English?Error: Where does he works?
Correcto: Where does he work?Error: Do you be hungry?
Correcto: Are you hungry?
Ponte a prueba
Toma cinco afirmaciones y convierte cada una en pregunta y en negación; luego practica este tema.
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