I haven't decided yet where to spend my holidays.这句话里的to是什么意思,为什么要放在句中?最好还能有相关的例句.

I haven't decided if I will leave for Beijing tomorrow.l haven't decided ----I haven't decided if I will leave for Beijing tomorrow.l haven't decided ------- ------- leave for Beijing tomorrow. I haven't decided when____(take) a holiday. I haven't decided 1个动词填空,I haven't decided which hotel (choose )to stay at . I haven't decided which plane I shall take to Beijing.(保持原句意思）I haven't decided which plane ______ ______to Beijing. I haven't decided whether to go to Japan.（同义句转换）I haven't decided whether _________ _________ _________to Japan. I haven't decided whether l'll go to see the film or not.保持愿意I haven't decided ______ ______go to see the film. I haven't decided whether l'll go to see the film or not.保持愿意I haven't decided ______ ______go to see the film. I haven't decided where I ____(spend) the coming holiday. I haven't decided if i hand in the money to my teacher.同义句 I'm leaving in an hour and I haven't ____ yet.picked filled decided packed I haven‘t do 和I didn’t do 的区别.比如说，I didn‘t decide和I haven’t decided。 i haven't decided when ___（take）a holiday yet I haven't decided to____ ____ _____ ____ ____ ____ (是走还是留) I haven’t decided which _____(choose)俺不会嗷嗷嗷 . I haven't decided when––（take）holiday yet. I haven't decided how to go.请问这句话有什么错误? I haven't decided when to leave for shanghai 同义句 I haven't decided when we went to the Happy Valley这个句子哪里错了?