wish后接that从句,表“(难以)实现的愿望”,后用虚拟语气,如表示对过去的愿望,that从句中用had+过去分词,如:
I wish they had passed the exam, but they filed.
对现在的愿望,that从句中用一般过去时,如:
He wished that he were (was) a girl now.
对将来的愿望,that从句中用would, should, might, could+动词原形,如:
I wish I could fly to the moon one day.
would rather接从句,表虚拟,从句中用过去时态,如:
I would rather he stayed at home.
It is time that后从句中常用过去时,如:
It is time that you planted trees.
补充:虚拟语气if从句的用法跟上述不尽相同,要分别对待。