I didnt stop before 12 oclock 这句话用的before对吗?为什么老师说stop是点动词不能

I didnt stop before 12 oclock 这句话用的before对吗?为什么老师说stop是点动词不能 请牛人翻译这句话：Ok.Pls stop by before you make decisions.I will be 这句话为什么是错的?I WISH THAT THEY DIDNT COME BACK LATE.书上说DIDNT 要换成 stop polluting before pollution stops you这个句子对吗? 这句话有错误吗Didnt sleep so well before,i feel so peaceful at this the snow (stop)before I got up this morning. you look tired.-yes,I non-stop until 8 oclock. stop smoking before smoking stops you iwas five oclock yesterday afternoon before i was going home I didnt dare open a window这句话话对吗?为什么不在dare后面加to? stop的延续性动词 请问next的反义词after before是反义词,next是下一个,那上一个是哪个单词啊?next stop