用法很随意,可加可不加的。如:1. This shop sells clothes, shoes, hats and so on.这商店卖衣服, 鞋, 帽子等等。 2. He talked about how much we owed to our parents, our duty to our country and so on and so forth.他谈到我们受到父母多少恩惠、我们对国家应尽的义务等等。3. The vessel was loaded with coal, lumber, and so on.那艘船装满了煤及木材等。要用逗号,比如:I have many hobbies,such as football,basketball,music,games,and so on.不用逗号举个很简单的例子:i like fruit,such as apples,pears and melons.(这里就不用and so on了,因为最后一个名词前面有了and)i like fruit,such as apples,pears,melons and so on.(这里就要用and so on)英语里面很多用法都是很细微的,多找几个例句多多体会一下,慢慢就领悟到了这个要根据所列举物来确定的如果列举的是同一种性的东西,但可不用逗号如果列举的不是同一种性的东西,但要用逗号,以示区别.如楼上的例子:1. This shop sells clothes, shoes, hats and so on.这商店卖衣服, 鞋, 帽子等等。2.Such as the weather, situation, and so on.(例如气候、地理位置等。)很多情况下是不太注重这方面的,更多的是趋向不用.