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have had did do 的区别

分类: 作业答案 • 2021-12-28 16:53:21

问题描述：

have had did do 的区别
各用在什么情况下

答

have用在现在完成时中,强调对现在造成的影响.其后跟动词的过去分词.如：I have eaten three eggs,now I am not hungry.had 1.如果做为‘有’的意思用在一般过去时态中.如,I had a book when I was four years old.2....

had better do中的had是不是表示过去式
英语：请用一般现在时介绍你一天的活动（usually）①get up,at 6:00am ②have breakfast,at 7:00am ③go to school,at 7:30am④run,at 10:00am ⑤have lunch,at 12:00 ⑥go home,at 6:00 pm⑦have supper,at 7:00 pm ⑧do homewoke,from 7:30 to 10:00pm⑨go to bed,at 10:30pm开头已给出：on weekdays, I usually get up.请将上面的的题目改为介绍Jim一天的日常活动，请注意单数第三人称谢谢各位了帮帮忙吧作业非常多写不完快快快
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一片英语科技短文的选择here have been many great inventions, things that changed the way we live in. The first great invention was one that is still very important today一the wheel. This made it easier to carry heavy things and to travel long distances. For hundreds of years after that there were few inventions that had as much effect as the wheel. Then in the early 1800's the world started to change. There was little unknown land left in the world. People did not
求have,has,had的区别?
if I have 和If I had的区别

have had did do 的区别

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