英语中一般将来时,过去进行时,现在完成进行时的概念,时态,和句型麻烦，请列一个表格，具体写出。

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• 英语中一般将来时,过去进行时,现在完成进行时的概念,时态,和句型麻烦，请列一个表格，具体写出。
• 求解答这几道英语时态题,急.1."I have____ [have] another letter from him"Mr.White said.2."His leg's____ [get] worse.That's too bad".3.____ you _____ [wait] for a bus now?4."I've finished my homework." "When ___ you ___ it "A.have;finished B.do;finish C.did;finish D.will;finish5.Judy ___ the Great Wall twice ,and now she still ___to go there.A.went to;wanted B.goes to;wants C.has gone to; D.has been to;wants6."Have you ever been to Shanghai?" "Yes,I ___ there last y
• 不知道这个点还有没有人 Sales of CDs have greatly increased since the early 1990s,when people __ to enjoy the advantages of this new technology.A.begin B.began C.have begun D.had begun 为什么选B不选CThe discussion___ alive when an interesting topic was brought in.A.was coming B.had come C.has come D.came为什么选DIt is said in the book that Thomas Edison(1847-1931)___ the world-leading inventor for sixty years.A.would be B.has been C.had been D.was为什么选D