所以这里可以说
You will become fat if you eat too much icecream.
或者One will get fat if she or he eats too much icecream.
为了突出“变胖”里面“变”的意思我们这里用become或者get,这两个词都有变化的意思.还有“吃太多的冰淇淋”是一个假设从句,一般用if引导的假设从句.）