not to mention;
Related words and phrases:
A couple are talking ...
Wife: I'd really like to go to the cabin for the weekend.
Husband: I really can't. I just have so much work to do.
Wife: Can't it wait for Monday?
Husband: I have three important reports due at work on Monday, let alone all the chores around the house that I haven't been able to do because I have been so busy.
Wife: Well, maybe next weekend, then.
Two friends are talking ...
Friend 1: I really need your help. Could you lend me a hundred dollars, please?
Friend 2: I would if I could. I don't even have ten dollars, let alone a hundred.
Friend 1: Thanks anyways.
There is no gerund form for let alone.
1) However, the last thing we want to do is criticize NASA -- let alone float any 'conspiracy theories.'
2) I would be too disgusted to even be in the same room as him let alone marry this punk.
3) Neither country is accustomed to, let alone comfortable with, an international system whose functionality rides in large measure on cooperation between ...
4) ... can not state with any confidence the exact economic growth rate for 2004, let alone 2008.
5) ... it has not examined a single transcript of any police interrogation, let alone the interrogation that took place in any one of these cases which it decides today ...
6) It is dreadful attempting to come up with a headline, let alone a good headline, when you don't really even know what you are writing ...
7) Johnson almost never communicates with his fans, let alone journalists.
8) ... appears that Chip, who never has more than two words to say, let alone any to me, stated something that begged for retaliation.
9) At least in Japan, you can barely find a woman preparing sushi, let alone a non-Japanese person.
10) ... however, is skeptical of the prospects of international intervention taking place, let alone succeeding.
11) I'd further guess he isn't by rights a US citizen, let alone a natural born US citizen, unless the law somehow works out that if his ...
12) Yes, there are days I can not get out of bed let alone run mile upon mile, but I celebrate those days that I can.
13) ... French could not even stop hundreds of old people from dying from heat, let alone help in this catastrophe.
14) Yes, science can never even aspire to understand the spiritual Universe, let alone God.
15) ... to suggest you're going to drop Mr. Dawkins from your friend list, let alone decide to cut him off your reading list is patently silly.
16) ... it's a miracle members have time to sleep or eat, let alone study or write papers.
17) I'm barely coherent enough to think, let alone write.
18) And when there are people who can not pay for food, let alone a computer and an internet connection, what talk of rights can you indulge in ...
19) ... as they weren't even expected to make it through alive, let alone come back.
20) but right now I fail to see how she's a millionaire, let alone a multimillionaire.