... 改为单数 Are they American cars ; There are some children in the boat ; Are those oranges 单数名词singulative 单数的 Singula ...
词源
1
singulative:
From French singulatif, from Latin singillatim ?(“singly", "one by one”), from singulus ?(“single", "separate”), from simplex ?(“simple", "single”), from Proto-Indo-European *sem- ?(“one, together”).