Fail to do...　做……不成功或不能
　　普通句：I fail to find clothes.
　　我找不到衣服。
　　次级高手句：I always fail to find clothes that suit me.
　　我总是找不到适合我的衣服。
　　高手句：I always fail to find clothes that suit me well.
　　我总是找不到非常适合我的衣服。
　　超级高手句：I always fail to find clothes that suit people of my shape well.
　　我总是找不到非常适合我这样身材的衣服。
　　专家句：When I'm shopping, I always fail to find clothes that suit people of my shape well.
　　我逛街的时候，总是找不到非常适合我这样身材的衣服。