3. few/little, a few/a little
[误]　Sorry, I have few money on me.
[正]　Sorry, I have little money on me.
[误]　Her books are few.
[正]　She has few books.
[误]　The work needs a few number of workers.
[正]　The work needs a small number of workers.
[正]　The work needs a few workers.
few后跟可数名词复数，little后跟不可数名词，都表示“几乎没有”的否定性意思；a few和a little区别也在于前者跟可数名词，后者跟不可数名词，都表示“有几个”的肯定性意思。
 4. no, not
no意思是“没有”，可以否定一切名词，修饰不可数名词和可数名词的复数时等于not any，修饰可数名词单数时等于not a/an；如果被修饰的名词通常情况下只有一个，则用它的单数形式；不能用a、 the、 all、 every等限制词之前，而not可以。
not意思是“不，不是”，可以否定一切动词，修饰动词；
no more than意思是“不过，仅仅”，相当于only，修饰“数量”词，强调“少”的含义；not more than意思是“至多，不多于，不超过”，用于陈述事实；no more ... than和not more ... than多用于多音节形容词的比较级。