过去式的问题 he has to stay at the office to do some extra work.变成过去式 为啥has要变had had是什么词性?后面to do some extra work为啥不把do变成did

过去式的问题 he has to stay at the office to do some extra work.变成过去式 为啥has要变had had是什么词性?后面to do some extra work为啥不把do变成did has的过去式是什么 has的过去式是什么? has的过去式是什么 has的过去式! have,has的过去式 -----could you tell me( )----yes,he( )to the U.S.AA.where is he;has been B.where he is; has gone C.where was he;has been D.where he was;has gone我选D.could在这里不能看成是can的过去式吗? He has made great progress since he came to our school.为什么从句用一般过去式,主句用现在完成时? he has bought an australian car and has gone to alice springs时态问题以及其他几句我不知道一般说话时候,什么情况用过去完成时,什么情况用过去式,新概念第二册中有一些问题请教大家：1.he has bought an au He fly to jingdezhen yesterday fly的过去式是什么 HE IS GOING TO PLAY FOOTBALL的过去式 he liked to chat like 的过去式是不是liked he的过去式 新概念英语第二课一个英语句子单词成分问题?But he has never managed to get enough money to have the church clock repaired.repaired 是过去式还是过去分词,属于倒装了吗?怎么感觉在这里又有点被动的意味,但 Jet Li is a kind man,he-----(give) away a lot of money to charity用过去式,应该可以的呀,可是答案是has given .为什么过去式gave不可以 今天学到新概念第一册第91课,文中有三个关于move的句子has he moved to his new house yet?这个句子是现在完成时为什么用过去式movedmoved是过去式，也是过去分词吗？ wants的过去式He wants to jump into the doat的过去式 英语过去式的问题比如He said,“We want ————（skate）on the lake. want的句型want to do sth 但是是过去式应该用哪一个?是to skate? 还是to skated