Question

or 和的意思。这个是用在否定句和疑问句里的吗？还有其他用法吗？

Answer 1

是的，or的常用用法如下

1. You use or to link two or more alternatives. 或者／和

例：

"Tea or coffee?" John asked. 

“喝茶还是喝咖啡？” 约翰问。

2.If you say that someone should do something or something bad will happen, you are warning them that if they do not do it, the bad thing will happen. 否则 (引导一个表示警告的从句)

例：

She had to have the operation, or she would die. 

她必须进行手术，否则会死的。