I was not sure if he was really interested or if he____polite.为什么用will j

I was not sure if he was really interested or if he____polite.为什么用will j if he was not sure whether he was going in the right direction什么意思 I wasn't sure if he was really interested or if he___polite? i wasn't sure if he was really interested or if he _____polite.此处为什么填was just being 24.I wasn’t sure if he was really interested or if he polite.A.was just being i wasn't sure if he was really interested or if he was just being polite 翻译 I am not sure( )he will come or not空格中填whether 还是if? this year he was not sure if Santa existed翻译谢谢 it was uncertain whether he would come中whether引导从句做表语,表语不是在系动词后吗,那为什么可以说i am not sure if he will come,求详解 the man we followed suddenly stopped ang looked as if he was not sure whether he was going in the r 找出下列英语句子的错误 指出来改正1.Bob denied to break the window,but I'm sure he did.2.I remember to have closed the door.But I'm not sure if I locked it or not.3.Let's face it.It' no good to worry any more tonight.4.Judy was finally I am not sure _____ he will come here oI am not sure _____ he will come here or not.答案给的是whether和if都可以,请问为什么if也可以呢? 用所给词连接句子Was he going to speak in front the class?I wasn't sure (if) I AM HAVING A BF NOW,BUT I AM NOT SURE IF I LIKE HIM,HE IS SWEET BUT NOT THE RIGHT ONE,PUTAIN. I am not sure if Tom ____ home.If he ___,I will call you.A will come,will come B comes,will comeC will come,comes CAN.I.SURE.AM.NOT.SHE.IF.COME 连成句子 i am not sure if they're coming什么意思? I wasn't sure if he was really interested or if he_polite.A.was just being B.had just been Why t...I wasn't sure if he was really interested or if he_polite.A.was just being B.had just beenWhy the answer is Please explain it.