the PRC was founded in 1949这句话是被动语态吗?是过去式时态吗?

the PRC was founded in 1949这句话是被动语态吗?是过去式时态吗? The PRC was founded on October 1st,1949.was founded是被动语态吧,可f The PRC was founded in 1949.变主动语态. The watch is made in China,这句话是一般时的被动语态吗 这句话是被动语态吗  请问这句话是被动语态吗? i was born in shanghai是被动语态吗 was being是什么时态的被动语态来着,记不得了.是过去进行时的被动语态吗? the test was finished是被动语态吗? 被动语态不是加过去分词吗?那为什么“be”在被动语态里是用“was/were”这两个词是过去式而不是过去分词 when was the PRC founded?it was founded on ____. 被动语态后面的动词时态是过去完成时还是过去式?