do you speak English?----only a little ,but i can speak japanese very well

问题描述:

do you speak English?----only a little ,but i can speak japanese very well
这里为什么用do you speak,而不用are you speaking

do you speak是问对方能不能说,有没有这个能力,而are you speaking是问对方“你现在说的是不是英文”.