否定 现在完成时has not 和has never 一样的吗

否定 现在完成时has not 和has never 一样的吗 什么是《现在完成时》的否定句是“主语+have/has+not+过去分词+其他”还是“主语+have/has+not 现在完成时has made friends和 has been friends区别 He has already gone home,改为否定和疑问怎么改?现在完成时好难,瞬间动词怎么改成持续性动词? 在现在完成时中,has和have在什么时候用. 初三英语现在完成时的1题he has already finished his homework改成否定句 Mary has tried Beijing roast duck.(变为现在完成时的否定句) 有关于现在完成时的~Dick is not here.he__________the cinema.A.has gone B.has been toC.has been away D.has been with 现在完成时中什么时候用has,什么时候用have.'ve和has/have一样吗 现在完成时请详解My uncle ( )abroad for years because he has no business there.A.has not been B.has not goneC.was D.is she has no ring 和 she has not ring has的否定形式 has’t和does not have already只能和完成时连用么?现在完成时能用于虚拟语气么?这题答案上选AAs if this ___you to tears...A has not already reducedB.were not already reducingC.did not already reduceD.would not already reduce 现在完成时.主语have/has+动词的过去分词.【ever.already] 1陈述句 2一般疑问句 3肯定回答/否定回答. 为什么现在完成时也要有现在完成时的动词have/has结构 初二现在完成时现在完成时必须都有have和has吗那for和since也是，have / has+动词的过去分词这个结构？ have/has +过去分词就是现在完成时么