单词：for certain
肯定地
for certain的用法和样例：
例句
- Even then she was certain the quarry stirred with life.甚至在那时，她就肯定地认为，这个采石场里充满生气。
- He doesn't know for sure that his grandfather has passed away.他不能肯定地知道爷爷是否已去世。
【近义词】
- surely无疑
- sure肯定的
- for sure确定
- sure enough确实，果然
- certainly当然