单数 el agua 复数 las aguas
Agua is always feminine,even in singular form.However,to avoid the double 'a' sound in la agua,we use the article el in singular form.In all other respects,agua is still feminine when singluar.
For instance,when adding an adjective,you use the feminine form:
The same is true for other feminine nouns that begin with an accented 'a'.
agua是阴性名词,la agua 但是前面的a 是双元音的关系,说单数的时候 我们会用el agua ,但是用形容词修饰的时候 还是用阴性形容词 比如 the red water => el agua roja