not to mention例句：The vibrations cause rapid wear and tear, not to mention outright damage, especially to electronics. 这种震动会导致快速磨损——更不要提直接损害，尤其是对电子设备。
not to speak of例句：To accept your present quotation would mean a heavy loss to us, not to speak of profit. 如接受你方现报价格，对我方来说是一个重大损失，更不要说利润了。
to say nothing ofWe use “to say nothing of” when we mention an additional thing which gives even more strength to the point you are making.例句：That leaves millions of houses and billions of dollars to go in Peru alone, to say nothing of other countries. 仅仅秘鲁一国，这样的房屋数以百万，需要资金几十亿美元，何况还有其他国家。
not to say：例句：Previous presidents would have been embarrassed, not to say insulted by such comparisons.
let alone例句：The country does not yet have enough electricity for itself, let alone for export. 这个国家的电连自己都不够用，更别提出口了。It is incredible that the 12-year-old managed to even reach the pedals, let alone drive the car.