Question 1

Why do we use подписан and оплачен instead of the regular past tense verbs подписал and оплатил?

Accepted Answer

Because this sentence uses the passive voice. If you used подписал and оплатил, it would mean the contract and the bill actually did the signing and paying themselves! Instead, подписан and оплачен are short-form past passive participles. They describe the current state or result of an action that was done to the subjects by someone else.

Question 2

Where is the verb for 'is' in this sentence?

Accepted Answer

In Russian, the present tense of the verb 'to be' is simply omitted. Because there is no linking verb here, we know these short-form participles describe the present state: the contract is signed and the bill is paid. If you wanted to say they were signed and paid, you would add the past tense verb был (for example, Договор был подписан).

Question 3

Why do both participles end in a consonant (-н) instead of a vowel like -а or -о?

Accepted Answer

Short-form participles act a lot like adjectives, so they must match the gender and number of the noun they describe. Both договор (contract) and счёт (bill) are masculine singular nouns, so the participles take the masculine singular ending, which is just the consonant -н. If the subject were feminine, like бумага (paper), it would end in -а (бумага подписана).

Question 4

Why use the conjunction а instead of и to mean 'and' here?

Accepted Answer

While и just links things together, а is often used when switching topics or balancing two distinct ideas. Here, you are stating a fact about one subject (договор), and then shifting focus to a different subject (счёт). Using а acts a bit like 'while' or 'as for,' which feels much more natural in Russian for this kind of two-part statement.

Договор подписан, а счёт оплачен.

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