be helpful to 后面接doing 这里运用 is helpful to sth.是用动名词形式strengthening the sense of reponsiblity and managing interpersonal relations 来充当sth.这里的动词变ing形式后,就相当于名词形式。it is helpful to do sth. 做……是有好处的 It is helpful for sb. to do sth. 某人做……是对他有好处的 这两个都是it 做形式主语 helpf...
sth.ishelpfulto sb. ……对某人有助....ishelpfulto sth.对……有助、我觉得这里是运用 ,.... is helpful to sth. 不过就是用动名词形式strengthening the sense of reponsiblity and managing interperso...
