ability可以分为可数名次和不可数名词.那么请问它在什么意思的时候才会是可数名词?求几句例句.

1.表示“能力”、“能够”,多为不可数名词；表示“才能”、“才干”,多用复数形式.如：
He is a man of ability.他是位有能力的人.
He is a man of many abilities.他是位多才多艺的人.
2.表示有能力做某事或具有做某事的能力等,其后通常要接不定式.如：
He has the ability to speak English fluently.他能流利地说英语.
The ability to be clearly heard is extremely important for newsreaders.声音宏亮清晰对新闻广播员来说极为重要.
但在现代英语中,也可后接 of doing sth(不如接不定式普遍,建议初学者谨用).如：
I admire his ability of doing the work quickly.我羡慕他工作做得快.
3.ability的反义词是inability,不是disability——inability表示没有能力或没有才能,而disability则指因先天缺陷或受伤变残而导致的无能.如：
Physical disability causes mental anguish.生理伤残会引起心理苦闷.