1. Biotechnology applications demands careful study. Biotechnology applications demand careful study.
2. The identification of the vertebrates have been done carefully. The identification of the vertebrates has been done carefully.
3. The use of multiple arrays provide many benefits. The use of multiple arrays provides many benefits.
4. Miniaturization and improved fabrication techniques has been used successfully. Miniaturization and improved fabrication techniques have been used successfully.
5. Previous work related to each topic are presented. Previous work related to each topic is presented.
6. Neither the insect nor the spiders was collected. Neither the insect nor the spiders were collected. Si el sujeto se compone de una palabra singular y otra plural, el verbo coincide en tiempo con la palabra que le queda más cerca.
7. The combination of characters have rendered the process very confusing. The combination of characters has rendered the process very confusing. El verbo es singular porque combination of characters es una sola unidad.
8. Optimization to reduce costs have been the main objective. Optimization to reduce costs has been the main objective.
9. Buchenberg et al. has already presented the results. Buchenberg et al. have already presented the results. La abreviatura et al. (y otros) convierte el sujeto en plural.
10. Thirty minutes are enough to produce good results. Thirty minutes is enough to produce good results. El verbo es singular porque treinta minutos es una sola unidad de tiempo (no son treinta minutos individuales).
11. A series of experiments were performed every day. A series of experiments was performed every day. Series es singular porque se refiere a un grupo específico de experimentos.
12. The data is very interesting. The data are very interesting. Data es el plural de la palabra latina datum. También se confunden de esta forma las palabras bacteria (bacterium), media (medium) y criteria (criterion).
13. This specie is very rare. This species is very rare. Species se escribe de la misma forma en singular y plural. One species, many species.
14. This investigations are important. These investigations are important.

Concordancia entre el Sujeto y el Verbo
Temario

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