peach的复数形式是peaches，peach作为可数名词意思是桃子的意思。按可数名词变复数的变化规则（以s,x,sh,ch 结尾的名词复数加es），所以peach的复数是peaches。

peach的复数例句

There is a peach on the table。（改为复数）
There are peaches on the table。（在peaches前加上some也是可以的）

There is a peach in my hand (改为复数句)
There are peaches in our hands

We bought a basket of peaches.
我们买了一筐桃子。

The peaches are not ripe yet.
这些桃子还是生的。

We ate a basket of peaches.
我们吃掉了一篮桃子。

I went to my student's orchard to pick peaches and pears.
我到学生的果园去摘桃子和梨。

Ripe, these peaches are sweet.
这些桃子熟了时是很甜的。

Sure, I will bring along some oranges and peaches.
没问题，我会带一些橙和桃。