right now和now的区别是用法不同、侧重点不同。right now是现在、此时此刻，也有立即、马上、即刻的意思，表示的是当前的时间状态。now是现在、如今的意思。

例句：If you have a problem with that, I want you to tell me right now。如果你有异议，我要你马上告诉我。We had some trouble in the village last night, but it's all right now.昨晚我们村里出了点乱子，现在没事了。I am now ready to answer your questions.我现在可以回答你们的问题了。