Let alone

He couldn't boil water, let alone prepare a dinner for eight.

My last run this month is an amazing performance of an "A2/3" Pacific, No. 60524, Herringbone (could there possibly be a more infelicitous name for a locomotive than this, let alone for the unhappy horse which first had to bear it?), […].

At the end of another ten years, let alone sixty, we are likely to see a very different pattern in the realm of British passenger locomotive power.

I wish he would let me alone so I could get some sleep.

Oh! let him alone for that. He's the boy that can get out of a scrape.

"It's not easy gettin' as good," rejoined the old woman, "an' you ought to be very glad to win him, if you can." "Let me alone for that," said Sally.