mean 后面加动词不定式或加动名词。不能加动词原形。
It means to change our lives in a very near future.这意味着不久将要改变我们的生活。
It means studying is very important for our future.这意味着，学习是对我们的未来很重要。
The actions mean helping others is very happy。
这种行为意味着帮助别人是很幸福的。
mean加动词原形还是加动词不定式
mean后加动词不定式表示打算做某事即mean to do something mean doing something表示意味着做某事，mean后不能用动词原形
