spread的過(guò)去式和過(guò)去分詞是什么？

　　Using too much water could spread the stain.

　　用水太多可能使污跡擴(kuò)散。

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

　　一共五次面談，分兩天進(jìn)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.

　　他們采取積極措施，防止疾病蔓延。

　　Use of computers spread rapidly during that period.

　　在那個(gè)時(shí)期，計(jì)算機(jī)的應(yīng)用迅速流傳開(kāi)來(lái)。