結べない

トムは靴ひもが結べない。

Tom can't tie his shoelaces.

トムは靴のひもが結べない。

Tom can't tie his shoelaces.

トムったら、自分でネクタイを結べないのよ。

Tom can't even tie his own tie.

トムは自分で靴ひもを結べない。

Tom can't tie his shoelaces by himself.

このネクタイはきちんと結べない。

I can't tie this tie properly.