not和no的不同

she wasn't older than her friend.可以
也可以说，she was younger than her friend.

not 和 no的区别简单说就是：
not有一定有any,a,an;
no后面永远没any,a,an,
not any = no

恩，可以这么说，但是还有一句同义句就是：

She was younger Than her Friend。