i not understang

i not understang "If you speak slowly,I will understang it."这句话对吗? I don't understang the story though there are___new words in l can't understang spoken english是什么意思 you will never understang my words什么意思 I believe not I think not i am not i do not 区别 能否用I think not.I believe not.Isuppose not. 翻译:i guess not i am not happy I am not twenty I will not meet