i'm not sure that it is free 肯定句子.
無不確信那個(gè)是否免費(fèi)
你是要改成疑問句嗎?對 我是想要疑問句。就是想向?qū)Ψ酱_認(rèn)某件事情。。。are you sure that is free ?你確定那是免費(fèi)的嗎？就完全可以了I want to make sure that I can cancel the “breakfast”,because I don’t think I really need it.那么這句這樣說對不對呢 謝謝啦i want to make sure that whether i can canclethe “breakfast” or not, because I don’t think I really need it.或者 i want to make sure that if i can canclethe “breakfast” . because I don’t think I really need it.加一個(gè)"是否" 句子會更流暢謝whether 表示 “是否” 后面必須加 or notif 表示 “是否” 不用加這里加if是必須的嗎？如果不加會不會有語法錯誤呢？whether of not 和if這兩句哪個(gè)表達(dá)更好一些呢？謝啦