The oceans and seas_____the islands are more or less polluted.
问题描述：
The oceans and seas_____the islands are more or less polluted.
答案是surrounding.是用非谓语动词的形式.
答
是非谓语动词的形式的用法.
因为句子的谓语是are
所以,前面surrounding the islands是句子的定语,修饰并指明The oceans and seas是围绕岛屿的海洋.
而且由于句子已经有谓语了,而句子并没有用定语从句修饰The oceans and seas,所以就用非谓语动词的形式的用法surrounding the islands 来修饰,作定语.