is的過(guò)去式形態(tài)

　　例句

　　The system was state of the art.

　　這一系統(tǒng)是當(dāng)時(shí)最先進(jìn)的。

　　It was a time of peak demand for the product.

　　那是對(duì)該產(chǎn)品需求最旺的時(shí)期。

　　Much of the form was not applicable to me.

　　表格中很多部分不適用于我。

　　For a long time his death was concealed from her.

　　他的死瞞了很長(zhǎng)時(shí)間都沒(méi)告訴她。

　　She was not only intelligent but also very musical.

　　她不僅聰明，而且極具音樂(lè)天分。