It’s time后接从句的几点用法说明
先看一道试题：
It’s time the child __________ to bed.
A. goes B. going C. went D. to go
此题应选C。关于It’s time+that从句，注意以下几点：
1. 从句谓语通常用过去时态或should+动词原形：
It’s time we started. 我们该动身了。
It is time that you left here. 你该离开这儿了。
It’s time you studied hard. 你该努力学习了。
有时也用 should+动词原形或用过去进行时，有时甚至将 should 省略(即只用动词原形，为非正式的美国口语)：
我们该走了。
正：It is time we left. (常见)
正：It is time we should leave. (可用)
正：It is time we were leaving. (可用)
正：It is time we leave. (少见，非正式美国口语)
2. 其他几点注意处：
(1) 其中的 It is 有时根据情况也可改为 It was，其后的时态不受影响：
你该上床睡觉了。
正：It is time you went to bed. (指现在而言)
正：It was time you went to bed. (指过去而言)
(2) time 前可以用 high，about 等修饰。
It is high time you told her the truth. 你该把真相告诉她了。
It is about time that I wrote her a letter. 我该给她写封信了。