The film had been on for five minutes when I got to the cine

The film had been on for five minutes when I got to the cinema.中的when 引导的是宾语从句还是时间状
The film had been on for five minutes when I got to the cinema.中的when
引导的是宾语从句还是时间状语从句,如何辨别?

是时间状语从句
如果是宾语从句应该是在动词后,如
He wants to know when I got to the cinema .
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再问： Twice as many households in the United States are headed by divorced ,separated,or never-married individuals as are comprised of nuclear families. 这句话什么意思呢
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