音标:[ʃʊr]
用法:形容词,表示对某事有把握或者肯定,也可以用作副词,表示肯定地或者毫无疑问地。
例句1:I am sure that I locked the door before leaving the house. (我确信我离开房子前锁了门。)
例句2:He is not sure if he can make it to the meeting on time. (他不确定是否能按时赶到。)
例句3:She was sure that she had seen him before. (她确信她以前见过他。)
例句4:I'm not sure how to solve this problem. (我不确定如何解决这个问题。)
例句5:Are you sure you want to quit your job? (你确定要辞职吗?)
同义词及用法:certain, confident, convinced, positive, definite
编辑总结:sure是一个常用的形容词,表示对某事有把握或者肯定,也可以用作副词,表示肯定地或者毫无疑问地。它可以用来表达自己的信心和确定性,并且可以和其他同义词互换使用。在写作中要注意使用恰当的语境来表达自己的意思。