i wouldn't have been +过去分词是什么时态?

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• 1.I'm alone at home.My parents_______Shanghai on business and will be back next week.A.have been to B.have gone to C.has been to D.has gone to2.Grandpa is sleeping.You________play the guitar.A.needn't B.mustn't C.wouldn't D.won't3.短语知识点Make sb.（ ）A.to do sth.B.do sth.
• i wouldn't have been +过去分词是什么时态?
• have been +过去分词是什么时态?
• 英语翻译I want to go to the science museum,but I have been lost for the past few hours,and I can't make heads or tails of these tickets machines.请翻译其中的“make heads or tails”是什么意思,
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