it was no use+doing还是to do

e no use doing sth是肯定的,绝对没错。例如 It is no use watching too much TV。看太多电视是没用的 这是固定搭配 所谓的接to do sth,是用在be used to do sth被用来做某事 It is no use trying to persuade him to have a holiday because he is a workaholic。(P53) 其中用了 It’s no use doing sth。(做某事没用 / 只是白费力气)句型。在这个句型中,动词-ing形式trying to persuade him to have a holiday是主语,it 是形式主语。这种动词-ing作主语,it 作形式主语的句型还有：1。It is no good doing sth。做某事不好 / 没用 / 不行 2。It’s a waste of time / money doing sth。做某事是白费时间 / 金钱 3。It’s fun doing sth。做某事很有趣