{ 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 ...

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 ...

2019年5月15日 · How does using "had" change the sentence meaning or grammar below - is it needed? Jamie returned to the table to grab the plane Bill had folded for him while they were waiting for the food. vs. Jamie returned to the table to grab the plane Bill folded for him while they were waiting for the food.

'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.

2019年3月13日 · Let's see if this entry had changed... This is the past perfect tense, and refers to the status of the entry being different when measured at some prior unspecified point. i.e. Last time I looked, it was "24" even though before that it was "26" Let's see if this entry was changed... There are two possibilities with this wording:

2014年4月19日 · The well had been producing clean water. The well was producing clean water. The first sentence implies that the well still is producing water, but it's no longer clean for some reason. The second sentence implies that the well is no longer producing water. Of course, context is very important. Here's another example: I had been running. I was ...

In the last two weeks I haven't had much time, so I haven't got that quotation for you. In the last two weeks I haven't had much time, but I expect to be able to address your question soon. In colloquial use, however, particularly when the fairly recent past is concerned, you are likely to hear either form regardless of context.

2015年8月13日 · The simple past denotes a finished activity in the past, and the present perfect denotes that the speaker's past is relevant to the present and future decisions. The use of "had served " is incorrect as past perfect, because PP is used to denote the order of events in the past and the reference point is in the past, not the present.