■关于虚拟语气
虚拟语气(subjunctive mood)用于表示一种假想的情况或主观愿望。英语的虚拟语气用法比较有限，主要用于条件从句或某些特定的句型中。如：
He behaves as though he were the owner. 他表现得就好像他是主人。
I wish (that) I hadn’t spent so much money. 但愿我没花掉这么多钱就好了。
If only I knew the answer to your question. 我要是知道你的问题的答案就好了。
Long live the solidarity of the people of the world! 世界人民大团结万岁!
If I had been taller, I would have joined the police force. 如果我的具头儿再高一点，我就会当警察。
If I were you I’d plant some trees round the house. 如果我是你的话，我就会在房子周围种一些树