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前面特殊疑問句中的vegetable用單數(shù)或復(fù)數(shù)都可以。如果問話者在提問時，心中想到的一種蔬菜，則問句就可能用單數(shù)；如果問話者在提問時，心中想到的多種蔬菜，則問句就可能用復(fù)數(shù)。就好比問一個人是否有孩子，既可問：Does she have a child? 也可問：Does she have children? 這主要取決于問話人當(dāng)時心目中是從單數(shù)概念出發(fā)，還是從復(fù)數(shù)概念出發(fā)，至于問題的答語則完全由答話人決定，如回答：　　

—Does she have a child? / Does she have children? 　　

—She has one child. / She has three children. / She has a daughter. / She has a daughter and two sons. 等等