maybe或许,比perhaps普通,但不够庄重;probably 大概,肯定的成分较大,是most likely的意思perhaps也许,是也许如此也许不如此的意思,大体和possibly同义而possible是个形容词,与以上的词不具有可比性.possibly 或者,常和canmay must等情态动词连用,比probably的语气弱得多.另外,还有likely一词.likely或许,通常与mostvery连用.上述词中,除possible外,全为副词.