spread的過去式和過去分詞是什麼？

Using too much water could spread the stain.

用水太多可能使污跡擴散。

A series of five interviews will be spread over two days.

一共五次面談，分兩天進行。

The disease is spreading at a rapid rate.

這種疾病正在迅速蔓延。

They took active steps to prevent the spread of the disease.

他們採取積極措施，防止疾病蔓延。

Use of computers spread rapidly during that period.

在那個時期，計算機的應用迅速流傳開來。