Their water isn't good to drink中to dringk是哪种类型的补足语?
问题描述：
Their water isn't good to drink中to dringk是哪种类型的补足语?
答
表语补足语
答
their water / isn't / good / to drink
主语 / 谓语 / 宾语 / 补语
subject / to be / object / object complement.
所以 to drink 是修饰宾语 good 的补足语
答
他们的水不适合饮用.
是drink的补足语,也就是宾语补足语.
希望对你有所帮助.