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

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

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）

第一句强调的是动作，强调玛丽的妈妈正在教英语。第二句强调的是一种状态，玛丽的妈妈还在从事于英语教学工作，要看你要哪种意思