Questions & Answers about Нам было нечего делать, и нам стало скучно.
Why does this sentence use нам instead of мы?
Both halves of this sentence use impersonal constructions. In Russian, when you express that there is "nothing to do" (нечего делать) or that someone is "bored" (скучно), the person experiencing this state is put in the Dative case (нам). It literally translates to "To us there was nothing to do, and to us it became boring."
Why use нечего here instead of the usual word for nothing, ничего?
нечего is a predicative negative pronoun used specifically with an infinitive (here, делать) to show a complete lack of options, meaning "there is absolutely nothing to do." Unlike ничего, which is used in standard negative sentences (like мы ничего не делали - we did nothing), нечего is the main predicate of the sentence and does not take a double negative.
Why is было used before нечего?
The phrase нечего делать on its own means "there is nothing to do" in the present tense. To shift the meaning to the past tense ("there was nothing to do"), you add the neuter past tense verb было. It takes the neuter form because this is an impersonal sentence with no grammatical subject.
What is the role of стало in the phrase стало скучно?