It's high time + that 從句謂語動詞有兩種形式：
動詞的過去式(be用were)；或者用shoud + 動詞原形（should不能省略)；
句型是虛擬語氣句型，意思“現在某人該做某事了”。
例句：
1、Therefore, it is high time that parents and schools should be alert to the problem and restrict children's access to those computer games.?
因此，現在正是家長和學校應該對這個問題提高警覺，限制學生接觸電腦遊戲。
2、It is high time that we threw away the phone and raised our heads up. Do cherish the ones around us and appreciate the splendid scenery ahead of us.?
是時候，我們把電話扔了，擡起頭來。珍惜身邊的人，欣賞我們在我們前面的輝煌。
3、It?is?high?time?that?we?should?tell?him?the truth.?
是咱們該告訴他實情的時刻了。
擴展資料相關句型：
It's about time that，從句謂語動詞同樣用過去式或shoud + 動詞原形（should不能省略)。
例句：
1、It's?about?time?that?it?did.?I don't?know?what?took?It'so?long a?time.
差不多是時候了。不知為什麽拖了這麽長時間。
2、It's?about?time?this?old?sewing?machine?was?put out to?pasture.
這部舊縫紉機大概到了被淘汰的時候了。