There is a knife on the table 复数形式

There is a knife on the table 复数形式 there is a knife on the table.的复数形式是什么 There’s a knife on the table.（改为复数） There is a knife in the kitchen.(改为复数形式) There is a knife on the table.划线部分提问划a knife There is a knife on the desk.改复数句 there is an apple on the table 改为复数形式 Is there an orange on the table?改为复数形式 There is an orange on the table改为复数形式There on the table.三个空? There is a glass of milk on the table的复数形式 There is a pair of glasses on the table.(改为复数形式） There is a cup of ice water on the table (该为复数 形式