英语超级高手不敢当,但下面的回答绝对是正确的!
我先把刚才给另一个同学做的回答复制给你：
no是个形容词,后接名词.如果接的是不可数名词,no=not any；如果接的是可数名词的单数,no=not a；如果接的是可数名词的复数,no=not any.例：
I have no milk.= I don't have any milk.
There is no book.= There is not a book.
There are no books.=There are not any books.
再来答复你的题目：
1.There isn't a spoon on the plate.(spoon是可数名词的单数）
2.There isn't a knife and fork on the table.（是knife and fork吧?knife and fork指一套刀叉,是一个整体,也是可数名词的单数）