It’s time you _____ threw those shoes in the bin. 你该把缔些鞋子扔进垃圾箱了。
不用填空是对，填 that 也是对的，但填 when 对吗？为什么？
【答】英语句子应该是：It’s time （that）you threw those shoes in the bin.
认真阅读《薄冰英语惯用法词典》中的下列内容，你就会明白“为什么”了：
“it is time+不定式”与“it is (high) time + that 从句”的区别：前者意思是“适当的时候到了”；后者（that常省去）意思是“早该做某事了”。that从句中谓语动词通常用虚拟过去式或+should + 动词原形。例如：It's time to start. 是出发的时候了。/ His talk was over; it was time for him to be off. 他讲完了，该走了。/ I think it's time you went to bed. 我想你早该上床休息了。/ It is high time (that) we should start. 我们早该出发了。