I cannot speak English, much less German.

Source: Tatoeba

I don't have a bicycle, let alone a car.

Source: Tatoeba

Nuclear power plants are dangerous, not to mention nuclear weapons.

Source: Tatoeba

He can't read French, much less write it.

Source: Tatoeba

There is no reliable evidence Imane Khelif is even intersex, let alone trans.

Source: Tatoeba

The vast majority of high school students I know can't read an unknown word and pronounce the letters in the right order, let alone pronounce it correctly or naturally.

Source: Tatoeba