Ejercicio 2
Individually, considering everyone else, write the correct form of the verbs in parentheses to complete the sentences in present perfect tense.
Parte 2.a
The scientists ______ (present) evidence that global warming is increasing every year.
- Sujeto plural The scientists → auxiliar have.
- Verbo present → participio pasado presented.
- Oración: The scientists have presented evidence...
Respuesta
have presented
Parte 2.b
In the past few years, wildfires ______ (increase) in scale and frequency in many communities.
- Sujeto plural wildfires → auxiliar have.
- Verbo increase → participio increased.
- Oración: ...wildfires have increased in scale and frequency...
Respuesta
have increased
Parte 2.c
Researchers ______ (debate) the value of teaching students to interpret phenomena in terms of energy forms.
- Sujeto plural Researchers → auxiliar have.
- Verbo debate → participio debated.
- Oración: Researchers have debated the value...
Respuesta
have debated
Parte 2.d
Recent studies ______ (show) that a few students develop an understanding of energy concepts.
- Sujeto plural Recent studies → auxiliar have.
- Verbo show → participio shown.
- Oración: Recent studies have shown that...
Respuesta
have shown
Parte 2.e
In my town, the river ______ (decrease) its level.
- Sujeto singular the river → auxiliar has.
- Verbo decrease → participio decreased.
- Oración: ...the river has decreased its level.
Respuesta
has decreased
