Where are my knife?They're on the desk.错在哪里?
问题描述：
Where are my knife?They're on the desk.错在哪里?
答
knife 改成knives
答
是一把还是多把？
一个句子中的单复数要统一，要是多把就改成knives要是单数就改is
答
Knife是单数 应该把它改为Knives
答
应该用单数啊！
答
knife 改为 knives
答
Where are my knife?They're on the desk。
错在名词和系动词不对应上，把knife改为复数形式knives就对了。