It hasn't been decided yet whether/if he will come soon这句话的时态Whether/if 引导是的宾语从句还是主句?主句的话为什么是主句?怎么区分IT是形势主语还是形式宾语?主过从现的时态是不是否定了 if后面

When it hasn't been your day Everything has been finished ,hasnt it .后面的附加疑问句为什么是hasnt it. but it hasn't been proven yet 翻译 It's the second time that Jack has been late,--?A.hasn't he B.isn't he C.isn't it D.hasn't it为什么呢? --why is he so upset --he___ his pen yesterday.it ___ yet.A,was lost;hasn't found B.was lost;hasn't been found C.lost;hasn't find D.lost;hasn't been found he hasn't told me anything about it= ____ ____ been told me about it, It l______ as if it hasn't been washed following the instructions.首字母填空. It’s the first time that she has been to the United States,__?A.isn't she B.hasn't sheC.isn't it D.hasn't we only heard about the meeting yesterday,so it ( )yet.A.didn’t prepare B.hasn’t preparedC.wasn’t prepared D.hasn’t been prepared --The window is dirty.--I know.It _____for weeks.A.hasn't cleaned B.didn't clean C.wasn't cleaned D.hasn't been cleaned What to do it hasn't been decided.改病句为何加with The window is dirty . i know .it hasn't been cieaned for weeks.怎么翻译 52.We ______ the bus for half an hour,but it ______ yetA.have waited,hasn't comeB.have been waiting,has been comeC.have been waited for,doesn't comeD.have been waiting for,hasn't come Your homework today hasnt been done,__?A.have you B.has it C.do you D.hasn't it he hasn't told me anything about it= ____ ____ been told me about it,.同意句 It`s the first time that he has been to Australia,isn`t it?中,为什么要用isn`t it,而不用hasn`t he? She ___this book all the week,but she ___reading it yetA.has read;didn't finish B.has been reading ;didn't finish C.has been reading;hasn't finished D.has read;hasn't finished John is not a good worker,for it is fifth time has been late for work._____?A hasn't he B isn't he C isn't it D hasn't it选哪个 为什么呢?