Question

请解释英语虚拟语气句子加分析（求！！）

Wang Ruyu could have mastered not only English and French but also German if she had studied harder last few years.

Answer 1

前面的主句"Wang Ruyu could have mastered not only English and French
"这个“sb. could have done sth.”的句型是第一个虚拟的状况，意思是“这个人原本应该可以达成某个目标”，这里是”Wang Ruyu原本应该可以学会英语法语和德语“，但是事实上她没有学会；

"if she had studied..."这个“if sb. had done sth.”的句型后面跟的内容是第二个虚拟的状况，意思是“假如某人干了什么事情的话”，实际上他并没有干，这里是“假如她最后几年有更加努力的话”，但事实上她是不够努力的。

所以整一句的意思就是”假如她最后几年有更加努力的话，她原本应该是可以学会英语法语和德语的。“

Answer 2

Wang Ruyu could have mastered not only English and French but also German是主句，是虚拟语气，if she had studied harder last few years是条件状语从句，也是虚拟语气。从句：If主语+had+done主句：主语+should/would/could/might+have done表示虚拟语气。

Answer 3

Wang Ruyu could have mastered not only English and French but also German 主句。表示虚拟部分成立的话，已经学会了英语和法语。用can /could have done.
if she had studied harder last few years.虚拟部分。对过去的事情假设，用had done 。意思是如果她去年努力学习。