1) some of the best known writers of detective fiction in the twentieth century were women. 第二个if i were you 和第三个if he be found guilty 有什么区别呢。 What is the difference between were and have been, and are these sentences gramatically correct?
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From other's conversation,i found out they mentioned i was and sometimes they also mentioned i were.
所以传到现代英语中，i am和he/she/it is的虚拟式的标准用法就应该是 if i/he/she/it were，而不是was。 由上面两表也可以看出，古英语中的虚拟式（虚拟语气）是非常规范、常用的，每个动词都有规范的.
2.were——be的过去时复数和第二人称单数形式;有时代替 was，用于条件从句、动词 wish 之后等。 be动词，意思和用法很多，一般的意思是：是，此种用法，有多种变化形. Is there any rules for i was/were? 在英语中，you作为第二人称，其后的be动词通常使用are或were。are表示现在时态，were表示过去时态。例如：that's my wife you were talking to（刚才和你说话的人是我老. 谢邀。 根据 主谓一致 的原则，i was是英语中的主流。。 但是在if引导的 虚拟语气 中，如果与现在相反，谓语动词用过去式，be动词一律为were.
If i were a bird, i would fly in the sky.
