Idioms. The Freedictionary. What is precious few

and also
precious little? So very few, very little – very few leaves on the trees or We have precious little fuel left. In these idioms precious serves as an intensive, a colloquial usage dating from the first half of the 1800s.

Had little room to move around and had nothing to escape.

I made it very kind of you to do the washing up, but you didnt have to do it. I do the washing up but I do my clothes and dishes.

converts to

Your action was not necessary.

To have to is to be obliged to ^1.

Is it kind of you to do the washing up, but you might not have done it?

converts to

I am a thinker I would not do it.

Might is “used in auxiliary function to express permission, liberty, probability, possibility in the past” ²

It was very kind of you to do the washing up, but you must not have done it.

Is it

possible to convert to I come to the conclusion that you didn’t do it?

Must is “used to indicate logical probability or presumptive certainty” ³

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are the must-read sites on # com/must/com/?