It is time 后的定语从句用虚拟语气

 　　从句谓语通常用过去式表示现在或将来，有时也用过去进行时或“should+动词原形”(较少见，且should不能省略)，其意为“(早)该干某事了”。如：

　　I think it's time you went to bed. 我想你该睡觉了。

　　It's time we went [were going¹, should go]. 我们该走了。

　　I think it's time they were taught² a lesson. 我想现在该给他们一点教训了。

　　注：time前有时有about和high修饰：

　　I think it's high time that she made³ up her mind⁴. 我想她该拿定主意了。

　　与其他的虚拟结构不同，该结构不能在该用 was⁵ 时而用 were。如：

　　It's time I was in bed. 我该上床睡了。(不用were)

1 going   

n.去，离去，地面(或道路)的状况，工作情况；(复数形式）goings: 行为；adj.进行中的，流行的，现存的

参考例句：

• We're going to listen to a report this afternoon. 今天下午我们要去听报告。
• He hates leaving the office and going on holiday.他不愿离开办公室去度假。

2 taught   

v.teach的过去式过去分词

参考例句：

• Children must be taught to be careful of traffic.必须教育孩子要当心车辆。
• Miss Brown taught my daughter last year.去年是布朗小姐教我女儿的。

3 made   

v.make的过去式和过去分词

参考例句：

• They were not made in china.它们不是中国制造的。
• The monkey made a long arm for the peach.猴子伸臂去摘桃子。

4 mind   

n.思想，主意，心意；v.介意，照顾，留心

参考例句：

• I've changed my mind.我一经转变主意。
• You really don't mind?你真的不介意？

5 was   

v.(is,am的过去式)是，在

参考例句：

• He said he was right.他说他是正确的。
• He was cold and hungry.他又冷又饿。