"unable to get to town without a car"
"unable to obtain funds"
"dyslexics are unable to learn to read adequately"
"the sun was unable to melt enough snow"
"an ineffectual ruler"
"like an unable phoenix in hot ashes"
Mr Ford is unable to write narrative.
出自： G. Greene
He has..tried to make her speak of it, and has always been unable.
出自： A. S. Byatt