it is whothwhile to do 和 doing 区别

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it is whothwhile to do 和 doing 区别

是it is worthwhile to do和doing的区别?
it is worthwhile to do sth和it worthwhile doing sth的意思都是“做某事是值得的”.但是前者是认为值得做,但还没做.而后者是已经做过了,觉得值得做.