We are not certain ( ) if it will be fine tomorrow.答案上写的是sur

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We are not certain ( ) if it will be fine tomorrow.答案上写的是sure.
certain sure能否连用.为什么?（有三个选项,exact,convincing,sure)

您好!
此处从语法角度讲肯定是错的,因为 “be sure ”这一系表结构在句子中肯定是有动词的功能,如果修饰就应该用副词来修饰,而 certain 只是形容词,certainly 才是副词. 所以愚以为应该是“We are not certainly sure if it will be fine tomorrow.” 望采纳,谢谢!

If it will be fine tomorrow,we will go to the park. We will go to the Great Wall if it will be fine tomorrow.错在哪改错1.If it will be fine tomorrow,we will spend our holiday at If it ___ fine tomorrow ,we'll go swimmingA.will be 可是看B.sha We'll go for a picnic if it will be fine tomorrow If it ___ fine tomorrow ,we'll go swimming.A.will be B.shall -What are you going to do tomorrow?-( ) A.If it will be fine We will have a picnic if it is fine tomorrow Will it be fine tomorrow?I'm not sure ,____ We'll go for a picnic if it will be fine tomorrow.求错在哪与原因 It will be sunny if you are fine是什么意思? 不是if it were to be fine tomorrow吗?提前是：were it to be fine