French-English translations for tout seul

by oneselfI have always wondered why shoe salesmen think I cant tie my shoes by myself.You ate the whole thing by yourself?She sat by herself in the corner, waiting quietly.
alone
uk
us
We cannot do it all alone, however. Nous ne pouvons pas tout faire tout seuls. It is not a question of having done nothing alone. La question n'est pas de ne rien avoir fait tout seul. However, those in favour are not alone by any means. Or ceux-ci ne sont pas tout seuls.

on one's ownA seven-year-old can get dressed on his own, but it might take a long timeI love cheese on toast, but I wont eat cheese on its own
on one’s own
sui generisIt is nothing to worry about sui generis, but in context of the other factors its alarming indeed