として～ないnot a single one
"Not a single one." After 一人, 一つ or 一日, として with a negative says there was no exception at all. It is written and emphatic; in conversation people say 一人も～ない.
Not a single member of the committee supported the proposal.
In thirty years she has never closed the shop for a single day.
How to form it
一 + counter + として + negative
一人として, 一つとして, 一日として, 一度として. Stronger still with a question word in front: 誰一人として, 何一つとして, どれ一つとして.
- After it
- A negative. Very often いない or ない: ～人は一人としていない, 一つとして～ものはない.
- Tone
- Emphatic and rather grand. There were no exceptions, and you want that noticed.
- Where you'll meet it
- Speeches, news, essays, novels. Seldom in everyday talk.
In use
Not a single person in the audience left their seat.
Not one of the twenty proposals submitted came in within budget.
Not one of the clocks on display was keeping the right time.
Close neighbours
一人も～ないN4
The everyday "not even one". として stands where this も would, and says the same thing with more weight.
Not one member of the committee supported the proposal.
としてN3
After a noun for a role, として is "as". After 一人 or 一つ, with a negative to come, it isn't.
He worked in the disaster area as a doctor.
Check yourself
1Which one fits?
彼の
Choose an answer to see why.
2What does this mean?
客は
Choose an answer to see why.
More detail
誰一人 and 何一つ also stand without として, and that is how you will hear them in conversation: 何一つ知らない, "I don't know a single thing".
The number is nearly always one. A well-known exception is 二つとして同じものはない, "no two are alike".
More sentences
Not a single applicant had the necessary experience.
Not a single player gave up before the end.
Not one of the ten new employees was late for the training.
Not one of the inspected parts could be reused.
Not one of these statements agrees with the facts.