1、If we wrote, I think he would rip up the letter.
如果我們寫信，我想他會把信撕得粉碎。

2、You'll occasionally rip up your hands and generally scab various body parts.
有時你努力的伸出手來，疤上加疤；有時嚇得你。

3、If we wrote I think he would rip up the letter.
如果我們寫信的話，我想他會把信撕得粉碎。

4、The machine is used to rip up the documents.
這臺機器使用來攪碎舊布并為織出新布提供纖維的。