況や

Kare wa bokokugo no bunpō sae ayashii. Iwan'ya gaikokugo o ya.

He is uncertain even about his native language's grammar, let alone a foreign language.

Puro no kishi de sae kono kyokumen o yomu no wa muzukashii. Iwan'ya amachua no watashi ni oite o ya.

Even professional Shogi players find it difficult to read this board state, let alone an amateur like me.

Kenzen na nikutai ni sura byōma wa shinobiyoru. Iwan'ya fusettei o kiwameru fukenkou na karada ni oite o ya.

Disease creeps even into a healthy body, let alone an unhealthy one characterized by extreme neglect.

Shitashii yūjin ni sae ienai himitsu ga aru. Iwan'ya shotaimen no hito ni hanaseru hazu ga nai.

There are secrets one cannot tell even to close friends, let alone to someone met for the first time.

Heiji de sae busshi no chōtatsu wa konnan de aru. Iwan'ya kono yō na hijō jitai ni oite wa naosara da.

Procuring supplies is difficult even in normal times, let alone in an emergency situation like this.

Yūshū na kare de sae sono shiken ni gōkaku dekinatta. Iwan'ya doryoku o okotta watashi ga gōkaku dekiru wake ga nai.

Even he, who is brilliant, failed to pass the exam, let alone me, who neglected to make an effort.