大学英语课文的一个句子分析
问题描述：
大学英语课文的一个句子分析
Alex Haley served in the Coast Guard during World War ll.On an especially lonely day to be at sea -- Thanksgiving Day -- he began to give serious thought to a holiday that has become,for many Americans,a day of overeating and watching endless games of football.Haley decided to celebrate the true meaning of Thanksgiving by writing three very special letters.
这是全新版大学英语第三层第五单元的一个句子,其中“On an especially lonely day to be at sea ”为什么要用to be at sea,用being at sea可以吗,或者只用at sea可以吗,to be at sea在句子里做什么成分?
答
to be at sea 表状语,表示一种状态 ,表示一种出海在外的状态,二个不同时态的状语连用
这里只能用to be而不能用being 或者其他的.什么是两个不同时态的状语连用啊