句子解析,he has experienced the ups and downs of life这里为什么用has而不用had?

句子解析,he has experienced the ups and downs of life这里为什么用has而不用had? he has had breakfast .has 与had he has had breakfast .句子中has 句子翻译 he has gone beyond seas He has bought it 这个句子对吗 It seems that he is not fit for the job .他需要的 is more experien用call回答. It seems that he is not fit for the job .他需要的 is more experien怎么说 急 英语句子变复数He has a blue T-shirt. He has lived here for eight years的同义句子 翻译句子：he has been doing nothing else ever since. too,work,do,to,much,has,he单词组成句子 got,today,has,headache,he,a 组句子 连成句子 now,he,up,written,three,to,has,books He has never been abroad before 分析下句子结构 l have three pen.He has only one.合并句子 连成句子 he,gone,several,has,Australia,to,times 请问这个句子中填什麼he has _______today with his friends. He has so many things to do.分析句子结构, 句子翻译 he has english at his fingers' ends