请看下面的题目:

If we __________ 200 years old,we __________ everything.

A. were to be,could change B. had been,changed

C. were,would have changed D. should be,changed

该题考查与将来事实相反的虚拟语气,此时的主句谓语通常用would(should,could,might)+动词原形,而从句谓语可能有以下几种情况:

1. 从句谓语用过去式:

If your father knew this,he would be angry. 要是你父亲知道了,他会生气的。

If it rained tomorrow,the sports meet would beput off. 要是明天下雨,运动会就推迟。

2. 从句谓语用should+动词原形(通常指可能性极小的事情,一般译为“万一”):

If it should rain,the crops would be saved. 要是有雨,这庄稼还有救。

此类句型的主句谓语有时可以用祈使句甚至将来时态:

If it should rain tomorrow,don’t expect me. 万一明天下雨,就不要等我了。

If I should be free tomorrow,I will come. 万一我明天有空,我就来。

3. 从句谓语用were to+动词原形 (通常指可能性极小可或近乎不可能,有时指出乎意料):

If the sun were to rise in the west,my love for you would not change. 即使太阳从西边出,我对你的爱也不会变。

所以,此题应选A。

核心知识点:与将来事实相反的虚拟语气