even if，granted that，assuming that到底怎么用啊，主从句时态

shuiing1127UID: 2406076

如题，请最好举例子，我在网上查了，但是还是不太清楚。
尤其是even if ，从句到底应该用什么时态呢？Even if the amount of radiation is increasing 还是 was increasing？主句：there is 还是there would be not enough evidence ……

shuiing1127UID: 2406076

没有人知道吗？顶一个，别沉下去

草木也知愁UID: 2487572

涉及的是虚拟语气（虚拟语气用来表示说话人的主观愿望或假想，而不表示客观存在的事实，所说的是一个条件，不一定是事实，或与事实相反）时态问题
需要结合你全文整体时态

① 表示与现在事实相反的情况：
主语+should/would/could/might+do+其他+if+主语+did/be(were)+其他
例：　
1.If I were you, I would take an umbrella.如果我是你，我会带把伞。（事实：我不可能是你）
2.If I knew his telephone number, I would tell you. 如果我知道他的电话号码，我就会告诉你。（事实：不知道）
3.If there were no air or water, there would be no living things on the earth. 如果没有水和空气，地球上就不会有生物。(事实：地球上既有空气也有水)
4.If I had any money with me, I could lend you some. 如果我带钱了，我就会借给你些。（事实：没带钱）
5.If he studied harder, he might pass the exam.如果他再努力些，就能通过考试了。（事实：学习不用功）

②表示与过去事实相反的情况
主语+should/would/could/might+have  done+其他+if+主语+had  done +其他
例：
1. If I had got there earlier, I should/could have met her. 如果我早到那儿，我就会见到她。（事实：去晚了）
2.If he had taken my advice, he would not have made such a mistake. 如果他听我的劝告的话，就不会犯这样的错误了。（事实：没有听我的话）