英语语法.《新概念3》

问题描述:

英语语法.《新概念3》
You can stretch your legs on the spacious decks,play games,meet interesting people and enjoy good food-always assuming,of course,that the sea is calm.我想请问that为什么可以这样用?

assuming that .宾语从句!
assuming that 现在分词作伴随状语 你明白了吗?