Dear teachers,

I would be grateful if you could advise me whether the following analyses are correct and what sorts of functions they (Much less/Still less/Let alone/Not to say) are in the sentences :

I shall never assent to, much less (shall I) participate in such proceedings. (Omission of "shall I")

The baby can't even walk, much (still) less/let alone (can it ) run. (Omission of "can it")

She never thought of it, still less (did she) do it. (Omission of "did she")

It is warm, not to say (is it or it is)(?) hot. (Omission of "is it" or "it is")

Thank you.