用于表示过去未实现的希望和计划的句型：
(1) should like to/ would like to/ would love to have done sth.
例：You should like to have written to your mother.
你本应当给你母亲写信。
(2) was / were going to do sth.(用过去将来时态表示原打算做什么)
例：Lucy was going to watch a basketball match.
Lucy 原打算看一场篮球比赛。
(3) was / were going to have done sth. 表示未完成原来的计划和安排
例：Lily was going to have cleaned her bedroom, but she had no time.
Lily 原打算清理她的卧室，但她没时间。
(4) expect, intend, hope, mean, plan, promise, suppose, think, want, wish ...
常用过去完成时态,在这些词后接宾语从句或者接不定式的一般形式;
或者用一般过去时态后面接不定式的完成形式表示过去未曾实现的愿望
例：She had supposed him to be very rich.她原以为他很有钱。
(5) wish that …had done sth.表示过去未曾实现的愿望.
例：I wish he had been here yesterday. 要是他昨天在这儿就好了。
(6) 情态动词should ,would, could, might, ought to等后接不定式的完成时，
表示过去本该做，打算做，想做而未做的事情.