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Modal Verbs of Obligation: must, have to, should

📄 ejercicios ingles 🎓 otro · 1° TELESECUNDARIA México 🇲🇽 MX 🗣 Español
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Respuesta rápida

2.a must; 2.b should; 2.c have to; 2.d should; 2.e have to.

📚 exercise ingles ⭐⭐ Dificultad 2/5 ⏱ 8 min lectura

Solución — Página 75

Uérakua anapu uantakua. Projects and Readings. Libro de Educación Telesecundaria Grado 1° Ciclo Escolar 2025 - 2026

1
Ejercicio 1

In pairs, read the following example.

  1. Se lee el ejemplo: Julia quiere jugar con sus amigas.
  2. Se identifica el modal: should expresa recomendación o consejo.
  3. Se observa la estructura: sujeto + should + verbo en forma base + complemento.
Respuesta

El ejemplo usa should porque se da un consejo: Julia should ask them which game they want to play.

2
Ejercicio 2

Fill in the blanks with the verbs must, have to, or should.

a
Parte 2.a

Before the game starts, the players ______ decide on the rules together.

  1. Es una obligación fuerte, propia de reglas del juego.
  2. Must indica obligación fuerte o necesidad.
  3. Estructura: sujeto + must + verbo en forma base.
Respuesta

must

b
Parte 2.b

Fausto doesn't know what to do. He ______ ask his friends for help.

  1. Se trata de una recomendación o consejo.
  2. Should se usa para dar consejos o sugerencias.
  3. Estructura: sujeto + should + verbo en forma base.
Respuesta

should

c
Parte 2.c

During the game, we ______ listen carefully to the rules so we can follow them.

  1. Es una necesidad o requisito para poder seguir las reglas.
  2. Have to indica necesidad o requisito por factores externos.
  3. Estructura: sujeto + have to + verbo en forma base.
Respuesta

have to

d
Parte 2.d

Once the game is over, the players ______ talk about what they liked the most.

  1. Es una recomendación o sugerencia, no una obligación estricta.
  2. Should expresa recomendación o consejo.
  3. Estructura: sujeto + should + verbo en forma base.
Respuesta

should

e
Parte 2.e

Andrés and Stefy ______ make sure they have their equipment.

  1. Es una necesidad o requisito antes de jugar.
  2. Have to indica necesidad o requisito.
  3. Estructura: sujeto plural + have to + verbo en forma base.
Respuesta

have to

3
Ejercicio 3

Discuss your answers with your partner.

  1. Se comparan las respuestas con las del compañero.
  2. Se justifica cada elección con la regla gramatical correspondiente.
  3. Se corrigen diferencias usando la tabla de modales.

Respuesta orientativa: Se discute en parejas por qué se eligió must, have to o should en cada oración, apoyándose en la tabla de la página.

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4
Ejercicio 4

In assembly, share your thoughts on your own answers and listen to other pairs explain why they chose their answers.

  1. Cada pareja comparte sus respuestas.
  2. Se escuchan las razones de otras parejas.
  3. Se comparan los criterios usados para elegir cada modal.

Respuesta orientativa: Se comparten las respuestas en plenaria y se argumenta la elección de cada modal según el grado de obligación o consejo.

Contenido de la página

You can use have to, must and should to talk about obligations, things that are necessary to do, or to give advice about things that are a good idea to do. There is a slight difference between the way they are used; have to is more frequent in conversation while must is used more in formal writing. Also, must only exists in the simple present and present perfect forms. Use should for advice or making suggestions.

Modal Verbs of Obligation

Modal Verb Structure Example Sentence Use
must subject + must + verb in base form + object The players must decide on the rules together. Indicates a strong obligation or necessity. Often uses rules or laws.
have to subject + has to/have to + verb in base form + object We have to listen to the rules so we can follow them. Indicates necessity or requirement, often due to external factors.
should subject + should + verb in base form + object You should ask your classmates for help if you don't know the rules. Indicates a recommendation or advice.
  1. In pairs, read the following example:

Julia wants to play a game with her friends. Julia should ask them which game they want to play together.

  1. Fill in the blanks with the verbs must, have to, or should.

a) Before the game starts, the players ______ decide on the rules together.

b) Fausto doesn't know what to do. He ______ ask his friends for help.

c) During the game, we ______ listen carefully to the rules so we can follow them.

d) Once the game is over, the players ______ talk about what they liked the most.

e) Andrés and Stefy ______ make sure they have their equipment.

  1. Discuss your answers with your partner.

  2. In assembly, share your thoughts on your own answers and listen to other pairs explain why they chose their answers.

Ejemplos resueltos

Julia wants to play a game with her friends. Julia ______ ask them which game they want to play together.

Se trata de un consejo o recomendación, por lo que se usa should: Julia should ask them which game they want to play together.

Tabla

Modal Verb Structure Example Sentence Use
must subject + must + verb in base form + object The players must decide on the rules together. Indicates a strong obligation or necessity. Often uses rules or laws.
have to subject + has to/have to + verb in base form + object We have to listen to the rules so we can follow them. Indicates necessity or requirement, often due to external factors.
should subject + should + verb in base form + object You should ask your classmates for help if you don't know the rules. Indicates a recommendation or advice.

Fórmulas y ecuaciones

subject + must + verb in base form + object

subject + has to/have to + verb in base form + object

subject + should + verb in base form + object

Glosario (5)

must
Modal que indica obligación fuerte o necesidad, frecuente en reglas o leyes.
have to
Modal que indica necesidad o requisito, frecuente en el habla cotidiana.
should
Modal que indica recomendación o consejo.
base form
Forma base del verbo, sin conjugación ni terminaciones.
obligation
Obligación; algo que es necesario hacer.

Preguntas para practicar

Discuss your answers with your partner.

Se comparan las respuestas y se justifica cada elección: must para obligación fuerte, have to para necesidad o requisito y should para consejos o recomendaciones.

In assembly, share your thoughts on your own answers and listen to other pairs explain why they chose their answers.

Se comparten las respuestas en plenaria y se argumenta la elección de cada modal según el grado de obligación o consejo que expresa la oración.

Temas y conceptos clave

Modal verbs of obligationmusthave toshouldobligación fuertenecesidadrecomendaciónconsejoforma base del verbo
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Preguntas que la gente también hace

¿Cuál es la diferencia entre must y have to?
Consulta la solución completa arriba o explora el libro entero para temas relacionados.
¿Cuándo se usa should en inglés?
Consulta la solución completa arriba o explora el libro entero para temas relacionados.
¿Cómo se estructura una oración con must, have to y should?
Consulta la solución completa arriba o explora el libro entero para temas relacionados.
📌 Antes de leer esto
  • • Reconocer el sujeto y el verbo en una oración
  • • Conocer el verbo en forma base
  • • Identificar presente simple
Siguiente tema sugerido
Modal verbs of prohibition and permission: mustn't, can, can't
📝 Transcripción de la página (texto seleccionable) 1918 caracteres

You can use have to, must and should to talk about obligations, things that are necessary to do, or to give advice about things that are a good idea to do. There is a slight difference between the way they are used; have to is more frequent in conversation while must is used more in formal writing. Also, must only exists in the simple present and present perfect forms. Use should for advice or making suggestions.

1. In pairs, read the following example:

Julia wants to play a game with her friends. Julia should ask them which game they want to play together.

2. Fill in the blanks with the verbs must, have to, or should.

a) Before the game starts, the players decide on the rules together.

b)Fausto doesn't know what to do. He ask his friends for help.

c)During the game, we listen carefully to the rules so we can follow them.

d)Once the game is over; the players talk about what they liked the most.

e) Andrés and Stefy make sure they have their equipment.

3. Discuss your answers with your partner:

  1. In assembly, share your thoughts on your own answers and listen to other pairs explain why they chose their answers.

Grammar

Modal Verbs of Obligation

Example SentenceUse
mustsubject + must + venb in base form+ objectThe players must decide on the rules together.Indicates a strong obligation or necessity. Often uses rules or laws.
have tosubject + has to/have to+ venb in base form + objectWe have to listen to the rules so we can follow them.Indicates necessity or requirement, often due to extennal factors.
shouldsubject + should + verb in base form+ objectYou should ask your classmates for help if you don't know the rules.Indicates a recommendation or advice.
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