不能,修饰不可数名词的一般有this,that,little,a little,a bit of,much,a great deal of,a large amount of 等：有些修饰语既可修饰可数名词也可修饰不可数名词,如all,some,enough,a lot of,lots of,plenty of,a (large) quantity of 等.
these 能不能修饰不可数名词,如：these corn.
不能,修饰不可数名词的一般有this,that,little,a little,a bit of,much,a great deal of,a large amount of 等：有些修饰语既可修饰可数名词也可修饰不可数名词,如all,some,enough,a lot of,lots of,plenty of,a (large) quantity of 等.