我认为和他为此争吵没有用 I don't think it's useful ( )(我认为和他为此争吵没有用 I don't think it's useful ( )( )( )( )about this

我认为和他为此争吵没有用 I don't think it's useful ( )(我认为和他为此争吵没有用 I don't think it's useful ( )( )( )( )about this 英语翻译我们的工作是为人民服务.跟他争吵是没有用的.他在给朋友购买礼物.第一个和第二个是主系表，第三个是双宾语！ I don't think he can 应该说是：我不认为他会唱歌.还是,我认为他不会唱歌.准确点,解释透彻一点, 根据汉语写句子我认为他今天不回来.I don't think he _____ _____ tody.【为什么填is coming】 I accept 和 I don't accept 我认为数学不如英语重要,译为英语 I don't think math is_____ ______ _____English I don't think the potatoes are ( ) ( ).我认为土豆不够咸. 英语：I don't think you are right,________?我认为你不对是吗 我认为他们不如你理解我I don’t think they understand me ------ ----- -------you do I don’t think you are suitable.我认为你不合适.我写的对吗? 我认为他们没有你理解我.I don't think they understand me ()()() you do. I don`t think it is _ _ _that book.我认为没有必要买那本书. 我认为她今天来不了 英语翻译 用I don“t tinnk.的形式 i don't know what to say.可不可以说i don't know say what有没有用say what的情况I don't know what do you say.为什么what后面要加do? I don't think they knew about it,did they?我认为应该是didn‘t theyI don’t believe she told a lie，didn’t she？ i don't stand和i can't stand i don't think i konw和 i think i don't know哪个对 I don`t think I konw和I think I don`t konw 这两句有啥区别