Question

she seems as if she had gone

这是虚拟语气吗
She She seems as if she had done a great thing

Answer 1

as if 词义是“似乎、好像、仿佛”,本身就带有似是而非的含义,因此有它引导的从句常可以用虚拟语气表示：
1. 对现在的虚拟：从句中谓语动词要用动词的过去形式（be 动词在正式英语中用 were,非正式英语中用 was）
2. 对将来的虚拟有三种情况：
1） should do
2） were to do
3） 动词的过去形式
3. 对过去的虚拟：had + 过去分词
你的提问中 as if she had done a great thing 是对过去的虚拟,整句的意思是“她看上去似乎曾经做过一件大事.”