早知文理百科

were 是过去时态 taken是被动； were 是;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； taken adj.感兴趣的;被吸引的...

there have been是现在完成时。 例句 There have been several muggings here recently. 最近这里发生了几起行凶抢劫案。 There have been strange happeni...