fruit的复数是fruits，fruit.
当fruit表水果时为不可数名词，复数为fruit；
fruit的用法例句：
1. I tend to stick to fresh fruit for pudding.
我一直坚持用新鲜水果做甜点。
2. The following summer the peach tree was laden with fruit.第二年夏天桃树就结满了桃子
当fruit表水果的种类时为可数名词，复数为fruits，
例如:two kindsof fruits，两种水果。
we have just imported many different tropical fruits.我们刚刚进口了许多不同的热带水果。
