Mary's mother is teaching English now还是说Mary's mother teaches English now正确?

问题描述:

Mary's mother is teaching English now还是说Mary's mother teaches English now正确?

如果指当下发生的动作用前一个.她正在教英语.
如果表示与过去将来的动作相区分,也可用后面这个.她现在教英语.(以前或以后可能干别的)