Libro de Uerakua Anapu Uantakua Projects And Readings 2 EGB

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Present Perfect Tense: uso de for y since

📄 ejercicios ingles 🎓 secundaria · 2° Secundaria México 🇲🇽 MX 🗣 Español

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Respuesta rápida

a) since, b) for, c) for, d) for, e) since, f) for, g) since, h) for, i) since, j) since

📚 exercise ingles ⭐⭐ Dificultad 2/5 ⏱ 6 min lectura

Solución — Página 116

Uérakua anapu uantakua. Projects and Readings. Libro de Educación Secundaria Grado 2° Ciclo Escolar 2025 - 2026

Ejercicio 1

Teoría: Present Perfect Tense

Affirmative: subject + auxiliary verb have/has + past participle + object or complement. Ejemplo: I have completed all my homework.

Negative: subject + auxiliary verb have/has + not + past participle + object or complement. Ejemplo: She has not taken chemistry.

Interrogative: auxiliary verb have/has + subject + past participle + object or complement + ? Ejemplo: Have you performed an experiment?

Note: El adverbio ever expresa una idea de tiempo no identificado antes de ahora; también significa anytime. Ejemplo: Have you ever had surgery? No, I have never had any surgery.

For indica cantidad de tiempo (I have been a nurse for ten years). Since indica cuándo comenzó un evento (I have been a nurse since 2014).

Ejercicio 1

Individually, write on the line for or since to complete each sentence correctly.

Parte 1.a

The use of oximeters has been increased ___ 2019 because of the pandemic.

2019 es un año, es decir, un punto de inicio en el tiempo.
La regla indica que since se usa con el momento en que empezó un evento.

Respuesta

since

Parte 1.b

Doctors study ___ years to become professionals in their field.

years expresa una cantidad o duración de tiempo.
La regla indica que for se usa con cantidad de tiempo.

Respuesta

for

Parte 1.c

The incubator has been used ___ more than 144 years.

more than 144 years es una duración.
Duración → for.

Respuesta

for

Parte 1.d

Has the doctor been in a surgery ___ ten hours?

ten hours es una cantidad de tiempo.
Cantidad de tiempo → for.

Respuesta

for

Parte 1.e

International Nurses Day has been celebrated on Florence Nightingale's birthday (May 12) ___ 1965.

1965 es un año, un punto de inicio.
Punto de inicio → since.

Respuesta

since

Parte 1.f

My sister has worn an arm sling ___ two months because she broke her arm.

two months es una duración.
Duración → for.

Respuesta

for

Parte 1.g

I have studied medicine ___ I finished high school in 2022.

La cláusula I finished high school in 2022 marca el momento en que comenzó la acción.
Momento de inicio → since.

Respuesta

since

Parte 1.h

In my community there have not been any doctors ___ more than five months.

more than five months es una cantidad de tiempo.
Cantidad de tiempo → for.

Respuesta

for

Parte 1.i

Has your brother taken pills ___ he was diagnosed as hypertensive?

he was diagnosed as hypertensive es el momento en que inició la acción.
Momento de inicio → since.

Respuesta

since

Parte 1.j

I have consulted with the doctor about my treatment ___ I was diagnosed with the flu.

I was diagnosed with the flu marca el punto de inicio.
Punto de inicio → since.

Respuesta

since

Contenido de la página

Present Perfect Tense

Affirmative

subject + auxiliary verb have/has + past participle + object or complement

I have completed all my homework.

Negative

subject + auxiliary verb have/has + not + past participle + object or complement

She has not taken chemistry.

Interrogative

auxiliary verb have/has + subject + past participle + object or complement + ?

Have you performed an experiment?

Note: The adverb ever expresses the idea of an unidentified time before now. It also means anytime. For example: Have you ever had surgery? No, I have never had any surgery.

For	Since
Shows amount of time.	Shows when an event started.
I have been a nurse for ten years.	I have been a nurse since 2014.

1. Individually, write on the line for or since to complete each sentence correctly.

a) The use of oximeters has been increased ___ 2019 because of the pandemic.

b) Doctors study ___ years to become professionals in their field.

c) The incubator has been used ___ more than 144 years.

d) Has the doctor been in a surgery ___ ten hours?

e) International Nurses Day has been celebrated on Florence Nightingale's birthday (May 12) ___ 1965.

f) My sister has worn an arm sling ___ two months because she broke her arm.

g) I have studied medicine ___ I finished high school in 2022.

h) In my community there have not been any doctors ___ more than five months.

i) Has your brother taken pills ___ he was diagnosed as hypertensive?

j) I have consulted with the doctor about my treatment ___ I was diagnosed with the flu.

Ejemplos resueltos

I have been a nurse for ten years.

for + ten years indica la cantidad de tiempo que dura la acción.

I have been a nurse since 2014.

since + 2014 indica el momento exacto en que comenzó la acción.

Tabla

For	Since
Shows amount of time.	Shows when an event started.
I have been a nurse for ten years.	I have been a nurse since 2014.

Glosario (6)

oximeter: oxímetro, dispositivo que mide el oxígeno en la sangre
incubator: incubadora, equipo que mantiene condiciones controladas para recién nacidos o cultivos
arm sling: cabestrillo, banda que sostiene el brazo lesionado
hypertensive: hipertenso, persona con presión arterial alta
flu: gripe, enfermedad respiratoria viral
pandemic: pandemia, enfermedad que se extiende por varios países

Temas y conceptos clave

Present Perfect TenseFor y sinceAdverbios ever y neverEstructura afirmativa del presente perfectoEstructura negativa del presente perfectoEstructura interrogativa del presente perfectoDiferencia entre for (duración) y since (punto de inicio)Uso de ever y never

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Preguntas que la gente también hace

¿Cuál es la diferencia entre for y since en presente perfecto?

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¿Cómo se forma el presente perfecto en inglés afirmativo, negativo e interrogativo?

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¿Cuándo se usa el adverbio ever en presente perfecto?

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📌 Antes de leer esto

• Conjugación del verbo have/has
• Formación del participio pasado de verbos regulares e irregulares
• Uso básico de preposiciones de tiempo

Siguiente tema sugerido

Present Perfect con already, yet, just y ever/never en preguntas y respuestas

📝 Transcripción de la página (texto seleccionable) 1612 caracteres

Present Perfect Tense

Affirmative subject + auxiliary verb have/has + past participle + object or complement I have completed all my homework.

Negative

subject + auxiliary venb have/has + not + past participle + object or complement She has not taken chemistry.

Interrogative auxiliary venb have/has + subject + past participle + object or complement + ? Have you penformed an experiment?

Note: The adverb ever expresses the idea of an unidentified time before now. It also means anyfime.For example: Have you ever had surgery? No, I have never had any surgery.