i don't speak english 能不能写成　i am not speak english 还有i can't speak english又是怎么回事呢,

i don't speak english 能不能写成　i am not speak english
还有i can't speak english又是怎么回事呢,

不能.speak是实义动词,am是系动词,实义动词的否定形式有don’t 和 doesn’t,can是情态动词,也可和实义动词连用,系动词和实义动词是不能连用的.