Eng

Don't need...

用不著

Can't use, Don't need, Weren't

(Can't, Couldn't, Didn't, Don't)

用不到

Don't need, Wouldn't

(Can't, Couldn't, Has not, Never, Not)

不需要

Didn't need, Doesn't need, Doesn't need to, Don't need, Don't need to

(Had to, Has to, Have to, Having to, Need, Needed, Needing, Needs, Require, Required, Requires, Requiring, To have to, To need, To require)