1、首先应该先从词意上来理SO如此 ,quite十分,很；such像……；very很,非常.
2、另外从用法上：so 如此、这么,用来修饰形容词或副词,例如so heavy a desk 这么重的桌子,这里面so和heavy是一个整体
3、very,quite,副词都作“十分,非常”解,但它们的使用场合却有所不同.
very可以修饰形容词或副词,但不能修饰动词.修饰动词的常常是much,very much或quite.例如：
The factory to be built will be very important in this city.
I like flowers very much.
I quite enjoy my job,so I don”t have to look for a new one.
副词quite作“完全”、“十分”、“还算”、“相当”、“确实”、“真正”解.它既可以修饰原级形容词和副词,也可以修饰动词,还可以修饰相当于形容词的过去分词或现在分词.例如：
The theatre was quite full last night.
He did the work quite well.
