until now引导什么从句

　　Until now I have always lived alone.

　　直到现在，我一直独自生活。

　　Until now, the Americans have been playing a very delicate political game.

　　直到现在，美国人一直玩着精心设计的政治把戏。

　　Until now, wage increases have always kept pace with inflation.

　　到目前为止，工资的增长与通货膨胀始终保持同步。

　　She found herself thinking thoughts that would never have entered her mind until now.

　　她发现自己正在考虑一些以前从来不曾有的想法。

　　They have threatened military action but held off until now.

　　他们扬言要采取军事行动，但一直拖到现在。