still less/much less/let alone＂更不用说，更何况＂ eg:I never thought of it,still/much less did I do it.我想也没想到它，更不用说去做了。 still more/much more"至于．．．更不必说＂ He can speak French,much more English.他连法语都会说，英语更不在话下．
