The aliens abroad has bad plans.这里的abroad是介词、副词还是形容词?

The aliens abroad has bad plans.这里的abroad是介词、副词还是形容词? ( ) great fun it must be to go abroad!这里的fun是名词还是形容词? from abroad这种说法对吗?abroad 是副词啊,介词能接副词吗? go abroad abroad不是名词,是形容词还有副词,但是怎么能go abroad呢?我不懂. Having a trip abroad is certainly good .abroad是副词在这里修饰什么呢? she has gone to live abroad.中to是介词还是动词标志? Study abroad中的study是作动词还是名词?abroad是作副词吗? return from abroad.中abroad是什么成分?是做副词吗?介词后面可以跟副词吗? bad 是形容词还是副词 He has never been abroad before.这里的been是什么 abroad是副词,到国外,go abroad就是去国外 是The plan of study abroad 还是The plan of studing abroad?