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 made a great p______ in his math. he has made great contribution to the causeof educationfanyi He has made great ______in his studies 用advance填空 He has made great progress thos term.变为感叹句, David has made great progress recently so he has and so have you, _____(obvious),he has made great progress i_____(obvious),he has made great progress in his studly with the teachers help 将单词填写完整 1.A person with high r__means he has made great contributions in his field.2.It is our great honour to invite the famous l__to give us a speech.3.The plot of the film was so c___that l couldn't follow it.4.We must apply t__to pr So hard has he worked in the past few months that he has made great progress in English翻译汉语 He has made great p____ with his English.I feel happy for this. ——great progress he has made!A how B how a C what Dwhat a 状语从句改错：He has made so great progress that we all feel happy. Tom has made great progress.He did a lot_____ (bad)last time This is good for studying.为什么不是study为什么不是That is good 1for study.study不是也可以作名词吗?百度词典：study名词 n.1.学习;研究;调查[U][P1]The plan is under study.那个计划正在研究中。He has made great pr ,John has made great progress ---- and ,So he has ；so have you 回答为什么是这样呢?不懂? Bruce has made great progress recently.____and____.A.So he has ;so you haveA.So he has ;so you have B.So he has;so have youC.So has he; so have youD.So has he; so you have 1-David has made great progess recently -__,and __A.So he has;so you are B.so he has ;so have y1-David has made great progess recently -__,and __A.So he has;so you are B.so he has ;so have youC.so has he;so have youD.so has he;so you have求解释, Because he works very hard＿＿ he has made very great progress.Aand B so C but D...Because he works very hard＿＿ he has made very great progress.Aand B so C but D / 选哪个,, 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?