When I am after 20

问题描述:

When I am after 20

你是不是想表达“我二十岁以后”?After I am 20,I will--表示决定做某事
“如果现在我超过二十岁”---虚拟语气--If I were over 20/ in my 20s
虚拟语气用were而不是 was