{ had {had unsatisfactory sex} by the time of his birthday on 20th Dec }. Using your original sentences as example Temporal displacement to present: I had my car for four years before I ever learned to drive it today. Temporal displacement to last year: I had had my car for four years before I had ever learned to drive it last year.

By the time we arrived, the party had begun. = The party began. Then we arrived. By the time we arrived, they had eaten all the food! = They ate all the food; then we arrived. I had had a bad day already, and I arrived home to find that it had been robbed! = I was having a bad day. During the day my home was robbed.

2020年2月10日 · We could say we had our copy replaced five years ago, and today it looks worn out. We could say we just have had our copy replaced, and the book is as good as new. To use grammar labels, "I have had the book replaced" is the Causative in the Perfect Aspect, in the Present; "I had the book replaced" is the Causative in the Simple Aspect, in the ...

James scored better because he used the right verb: had had, instead of just had. The sentence is not unlike the famous Buffalo sentence; it's a contrived example to show how many times a single word can be strung together consecutively in a sentence. Another example is the sign maker who criticizes her own work by saying:

2014年2月12日 · I have had letters delivered to me in the last week. The first (marked with an asterisk) is incorrect because it defines a specific time, and the form does not work with a specific time. 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 ...

过去完成进行时：By the time my girlfriend showed up, I had been working non-stop on this stupid paper for 24 hours! 到女友进门那一刻，我 !@#$%^&* 已经跟这该死的 paper 连续搏斗了整整24小时了！ 现在完成进行时： Yes, I am flying high today, but I have been working like a dog for 25 years! 你只看我 ...

2016年5月15日 · For an actual example of "had had", as in: "We had had the car for ten years before it broke down last winter." englishpage.com states, "With Non-Continuous Verbs and some non-continuous uses of Mixed Verbs, we use the Past Perfect to show that something started in the past and continued up until another action in the past."

To me, "had been" implies a change of state: The phone rang. I was asleep. (No implication of state change. Further sentences would clarify if the speaker woke up, or never heard it.) The phone rang. I had been asleep. (But I after it rang, I wasn't asleep any more.)

'He has had his breakfast'. - present perfect tense with a third person singular subject as in 'He has eaten his breakfast. 'I had had my breakfast.' - past perfect tense as in 'I had eaten my breakfast.' Here, the fist part of the verb phrases have/has and had are auxiliary and the second part had is the past participle form of the main verb have.

had是have的过去式（一般过去时） have had 是have的现在完成时. 区别： 1、I had a girlfriend. 我有过一个女朋友，是指过去交过女朋友这件事，但现在没有，即使有，也不是之前那个。 2、I have had a girlfriend. 我有一个女朋友，指过去有女朋友这个状态，现在已经没有了。