The glass is going to crack.那玻璃将会爆裂.(未来式)The glass is cracking.那玻璃正在爆裂.(进行式)The glass cracks when being hit too hard.若打得太大力,玻璃会破裂(现在式)There are cracks on the glass.玻...只是举例子，感觉不是很全面。还是不了解他们的区别和用法我不是已举了例子、说了句子的意思和它们的时态语法了吗?

那是:
crack 现在时
cracking进行时
cracks 第三者现在时 或用作名词 "裂痕"(复数)
cracked 过去时再麻烦下。
翻译。
杯子裂开了
杯子是裂的
有2个杯子裂了杯子裂开了
The cup cracked.

杯子是裂的
The cup is cracked

有2个杯子裂了
There are two cups cracked.
或
There are two cups that were cracked