Question

Найти сказуемые и определить их видовременные формы. 1. It has not been possible to determine the exact origin because it has not been possible to identify the exact place or materials from which any particular oil accumulation originated.

Answer 1

1. has been - pres perf, originated - past simple.

Answer 2

Identifying Predicates and Their Tenses in the Given Sentence

The given sentence is: "It has not been possible to determine the exact origin because it has not been possible to identify the exact place or materials from which any particular oil accumulation originated."

The predicates in the sentence are "has not been possible to determine" and "has not been possible to identify."

The verb forms and their tenses in the predicates are as follows: 1. "has not been possible to determine" - Present Perfect Passive 2. "has not been possible to identify" - Present Perfect Passive

The use of "has not been" indicates the present perfect tense, and "to determine" and "to identify" are in the infinitive form, indicating the passive voice.

This analysis shows that the sentence uses the present perfect tense in the passive voice to convey the ongoing nature of the inability to determine the exact origin and identify the exact place or materials.

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