In my academics i have learned that had is only used to show that something happened prior to some event in. So don't worry so much about how to use had had as a unit of. Do you have any reference or evidence for this assertion about the past perfect?
Colloquialism Definition and Useful Examples of Colloquialism • 7ESL
I had a bad day i had had a bad day In the last two weeks i haven't had much time, but i expect to be able to address your question soon. For example, what is the difference between the following two sentences:
It is used to describe experiences one has had in the past (and that hence influence the experience with which you speak today), changes over time, uncompleted.
How james while john had had had had had had had had had had had a better effect on the teacher is correct sentence? 例如：had he succeeded, he would have acquired a monopoly 1、have+过去分词：现在完成时表示的动作发生在过去，以now的时间为基点，但侧重对now产生的结果或造成的影响。 2. In the last two weeks i haven't had much time, so i haven't got that quotation for you. Being a non native speaker of english i am not sure about the usage of had.
15 there's no special magic with had had , they don't really go together as a pair anymore than had wanted go together. I have come across a few sentences that contain have had. Because it seems wrong to me, as a native english speaker, and google ngrams says that. I would like to know in what kind of situations we should use this combination.
