right now是什么时态的标志词

　　You can go right now for all I care.

　　你可以马上走，我才不在乎呢。

　　I'm warning you; stop it right now!

　　我警告你，马上住手！

　　I have a client with me right now.

　　我现在有个客户。

　　I'm short of cash right now.

　　我眼下正缺钱。

　　I can't tell you any more right now, but watch this space.

　　目前我不能跟你多说，等着听下面发表的消息吧。