说法如下：
下定决心做某事英语有三种说法：分别是be determined to do sth、bend on doing sth、make up one's mind to do sth。
例句赏析：
1、一个人若下定决心做某事，那么就不能像纸上谈兵那样轻言，必须得坚持下去做这件事，因为态度决定一切。
If a person determined to do something , then they can not as easily as paper. Must persevere in doing this matter, because attitude is everything.
2、她持如此固执的态度以致交通费坚持要求固执的态度一旦她下定决心做某事，就没人能找到合适的话语说服她改变主意。
She had such a stubborn attitude that once she was determined to do something, no one could find proper words to persuade her to change her mind.
月影星云
