请说明理由!）If there _no water ,there ___ no life on

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请说明理由!）
If there _______no water ,there _________ no life on the earth.
A is ,would be B was ;was C were ;would be D were ;would have
请简要介绍该知识点.

选项：C were; would be
1.首先确定这里应该用虚拟语气
1）水、空气和食物是人们生活不可缺少的,缺一不可,而这里从句说的没有水只是一种假设；主句地球上没有生命是在没有水的情况下的一种假设.
2）这里是对现在情况的虚拟,以下是对各种时间虚拟谓语动词的形式：
if 从句——
* 对现在：谓语动词用过去时态,动词 be 用 were；
* 对过去：谓语动词用过去完成时态
* 对将来：谓语动词有三种情况——
过去时
should + 动词原形
were to + 动词原形
主句——
* 对现在或将来：谓语动词用 would + 动词原形；
* 对过去：谓语动词用 would have + 动词原形
2.存在句型应该是 there be,there have 是错误形式,因此 D 项中的would have 不正确.

if there is no water,there__no life If there is no water on the earth 英语语法疑惑Without water,there would be no life请把本句改为一个if引导的虚拟语气 What（）would happen if there was no water on the earth?A.wil where there is no water ,there is no life There would be no life ___ water. 请说明理由!）-What happened there?-They argued _________ the waite Without sunlight ,or water or air ,there ___ no life on the 改写同意句1If there is no water,no life can keep alive 2 With the what would happen if there were no water on the earth 句型怎么转换 If there no water on the earth,we can"t live.同义句转换 There ______ no life on the moon.

请说明理由!）If there _______no water ,there _________ no life on

请说明理由!）If there _no water ,there ___ no life on