改為否定句是I don't have any grapes。這句話是實義動詞擁有的意思，改為否定句要藉助助動詞do，就是由i have轉變成i do not have，而some一般多用於肯定句中，改為否定句時要變為any。some和any都表達“一些”的意思。
例句：
I have some snacks。我有一些零食。
I don't have any snacks。我沒有一些零食。
I have some old clothes I don't wear。我有一些不穿的舊衣服。
I don't have any old clothes I don't wear。我沒有一些不穿的舊衣服。
Jerry has some apples and oranges。傑瑞有一些蘋果和橙子。
Jerry doesn't have any apples and oranges。傑瑞沒有一些蘋果和橙子。
