It is(high)time that加从句,从句只能用过去式么?还是可以用should+do

问题描述:

It is(high)time that加从句,从句只能用过去式么?还是可以用should+do

It is (high) time that从句是固定句式,从句中动词要么用过去式,要么用should do结构,二者皆可.