这样是没用的英语

last one

Many people now use the Internet for study.I can use the Internet to get information about this ever-changing world.可以吗？

It is useless to do sth. / Doing sth. is useless. It is a waste of time to do sth. / Doing sth. is a waste of time.

it's uselsess doing sth.

it's useless to do sth,或者it's no use doing sth

There is/was no use in doing sth.做某事是没有用的