feel sure that

• 确信 ...； 肯定 ...

feel sure that的用法和样例：

例句

1. I was convinced that he knew the truth.
   我确信他知道事实。
2. I surely believe I send out that letter.
   我确信我寄出了那封信。
3. I'm sure I don't deserve so much praise.
   我肯定自己不值得这么多赞扬。
4. I do not doubt that he will succeed.
   我肯定他会成功。