when were mirrors invented

by

Diablo

when were mirrors invented

· From other's conversation,I found out they mentioned I was and sometimes they also mentioned I were. Is there any rules for I was/were? What is the difference between "were" and "have been", and are these sentences gramatically correct? 1) some of the best known writers of detective fiction in the twentieth century were … · 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. e.g. If I were a bird, I would … Which of the following is correct ? Who were these buildings designed by? Or Who was these buildings designed by? Does were/was refer to "these buildings" or "who"? "If you were here 10 minutes ago, " The use of "were" can get more complicated ,the sentences below use the "were to" clause to indicate an element of uncertainty to the actions and … · That is, both "were to" (using the irrealis "were") and "was to" (using a past-tense verb) would usually be interchangeable in a sentence structured similar to yours, but that … The Prime Minister said: "I have indicated in opening remarks that I do not intend to be Prime Ministerial candidate if the UPA were to come to power after the general elections. BJP … · Use were (instead of was) in statements that are contrary to fact. In your sentences it should definitely be: "What if the Moon were a Disco ball" - It's not true, that's why we use …

When Were Mirrors Invented? | OddFeed

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