同学你好，该知识点来自沪江网校《雅思语法精讲【随到随学班】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学你好
不可以的噢 overseas可以是副词可以是形容词
1.形容词 (adj.)
The overseas trade has become the main project.
海外贸易成为主要的项目。
She is an overseas student in Britain.
她是个在英国的外国留学生。
Over the years, hundreds of overseas students have studied at that university.
几年来，几百个留学生在那所大学学习过。
2.用作副词 (adv.)
He lived overseas for many years.
他在海外生活了多年。
He qualified in London as a teacher of English overseas.
他在伦敦取得了海外英语教师的资格。
但是 aboard 就是个副词或者介词
adv. 在船上；在火车上；在飞机上
prep. 上船；上飞机；上车

1.用作副词 (adv.)
Little Tom and the sailors spent two months aboard.
小汤姆和水手们在船上过了两个月。
All passengers aboard fell into the river.
船上所有乘客皆落入河中。
A limited menu is available aboard the train, but a nice bottle of vin rouge and a simple picnic hamper will enhance your Orient-Express fantasy.
在火车上提供的食物很有限，自备一瓶上好法国红葡萄酒和一份简单的野餐食盒，将会提升你东方快车之旅的乐趣。
The children were so excited to be taken aboard for the first time.
那些小孩第一次被带上飞机，简直兴奋极了。

2。用作介词 (prep.)
They were the last two to go aboard the ship.
他们是最後两位上船的。
We must not take combustible goods aboard.
我们不可以带易燃物品上船。
不能随意替换的噢