是的過去式是什麼

The system was state of the art.

這一系統是當時最先進的。

It was a time of peak demand for the product.

那是對該產品需求最旺的時期。

Much of the form was not applicable to me.

表格中很多部分不適用於我。

For a long time his death was concealed from her.

他的死瞞了很長時間都沒告訴她。

She was not only intelligent but also very musical.

她不僅聰明，而且極具音樂天分。