这两句里的时态和定语从句为什么这样用？

mxh3698

1、

①里面时态为什么这样用？

2、

②里面的定语从句修饰的是前面的哪个word, phrase, clause…？

WASHINGTON -- US Senate on Thursday passed a resolution curbing the US president's ability to use military forces against Iran without congressional approval.

…

The White House has threatened a veto if the resolution is sent to Trump's desk, ①while the Senate will not have enough votes to override the veto.

The House last month passed a similar bill aimed at restraining Trump's war powers against Iran, but it was largely symbolic and not taken up by the Senate.

Thursday's vote came over a month after a US strike under Trump's order killed Qassem Soleimani, former commander of the Quds Force of Islamic Revolution Guards Corps, ②which has raised fears of an uncontrolled conflict between the United States and Iran.

大橙子

1，(a) 参议院通过了一个决议，(b) 特朗普威胁要动用否决权，(c) 参议院可以再投票推翻特朗普的否决，但估计票数不够
c 这件事还没发生，所以用将来时
2，which 有一种特殊用法，它可以引导从句修饰前面的整个主句，代替主句所表示的整体概念或部分概念。在这种从句中，which可以作主语，也可以作宾语或表语，多数情况下意思是与and this 相似，并可以指人。例如：
5 k. x; d( s7 KHe succeeded in the competition, which made his parents very happy.

mxh3698

大橙子 发表于 2020-2-17 08:20
1，(a) 参议院通过了一个决议，(b) 特朗普威胁要动用否决权，(c) 参议院可以再投票推翻特朗普的否决，但估 ...

受教了，谢谢赐教

Jefferyhaohao

感谢楼主和各层主分享