天刀拔剑:英语语法

a few :意思是几个,有些,数目虽小,但是肯定的.
a little : 意思是有一些,有一点,量虽小,但是肯定的.
less 是little 的比较级

a few 的意思是一点，表很少但是有．它的反义词是few，通常翻译为几乎没有．a little 的意思为一点，表很少但是有．它的反义词是little，通常也翻译为几乎没有．a few和a little的区别在于前者是修饰可数名词，后者是修饰不可数名词啊．
less 是little ,few 的比较级，可以翻译为较少的，通常和than连用，意思是比．．．．少．它既可以修饰可数名词，也可以修饰不可数名词．

a little
Somewhat; a bit:
一点儿：
felt a little better.
感觉好了一点
less
Pronunciation: 'les
Function: adjective, comparative of 1LITTLE
Etymology: Middle English, partly from Old English l[AE]s, adverb & n.; partly from l[AE]ssa, adjective; akin to Old Frisian lEs less
1 : constituting a more limited number <less than three>
2 : of lower rank, degree, or importance <no less a person than the president himself>
3 a : of reduced size, extent, or degree b : more limited in quantity <in less time>
usage The traditional view is that less applies to matters of degree, value, or amount and modifies collective nouns, mass nouns, or nouns denoting an abstract whole while fewer applies to matters of number and modifies plural nouns. Less has been used to modify plural nouns since the days of King Alfred and the usage, though roundly decried, appears to be increasing. Less is more likely than fewer to modify plural nouns when distances, sums of money, and a few fixed phrases are involved <less than 100 miles> <an investment of less than $2000> <in 25 words or less> and as likely as fewer to modify periods of time <in less (or fewer) than four hours>.

a few

A small number of persons or things. This phrase can differ slightly from few used alone, which means "not many." For example, The party was to end at eight, but a few stayed on indicates that a small number of guests remained, whereas The party began at eight, and few attended means that hardly any guests came. [Late 1200s] Also see quite a bit (few).
这些都是比较详细的解释.
对于英语基础好的人有很大帮助.