difficult副词

difficult的副词形式是difficultly。difficultly的意思是难，困难。difficultly的例句：I have never had any difficultly in believing in God（我对上帝的信仰从未改变过）。

difficult不是副词

difficult是一个英语单词，可以用作形容词，可以翻译为困难的、难做的，等等。