更何況的英文

I can't accomplish the task, neither does he.

If I can't xxxx, do you think he can do it?



I ain't sure if that is the meaning for much less, I will use it this way


He is much less the same as his father. ( if you are saying his temper is bad)

this means

His temper is as bad as his father's.

Not to mention會更好！

Let alone

I cannot do it, let alone John. (Rarely do we say Let alone him)

much less的意思係更何況
I cannot do, much less him?