have difficulty可数吗

　　If you run up too many bills, you'll have difficulty paying them.

　　该账该多了，就不好还了。

　　I have difficulty learning French irregular verbs; I just can't seem to get them into my head.

　　我学法语的不规则动词有困难，我似乎无法记住。

　　The changes were made with surprisingly little difficulty.

　　这些变化几乎没有遇到阻力，简直不可思议。

　　We found the house without difficulty.

　　我们轻而易举就找到了这栋房子。