is的過(guò)去式和過(guò)去分詞

is的過(guò)去式是was，過(guò)去分詞是been。is用于第三人稱單數(shù)現(xiàn)在時(shí)。例句：That's the way it is.就是這么回事。

例句

1、The video is programmed to switch on at ten o'clock.電視機(jī)設(shè)定在10點(diǎn)鐘自動(dòng)打開(kāi)。

2、The room is 15 feet in length and 10 feet in breadth.這房間長(zhǎng)15英尺，寬10英尺。

3、Pain past is pleasure.過(guò)去的痛苦即是快樂(lè)。

4、A friend in need is a friend indeed.患難之交才是真朋友。