■ enough of a

放在名词前面，表示完全足够称得上这个名词。

• John was enough of a fool to agree.约翰竟然同意了，真够傻瓜的。
• He was enough of a crack shot to fire three bullets in five seconds at a moving target from about 100 yards.他简直是个神枪手，能够远在大约一百码之外，用五秒钟向一个活动目标发射三颗子弹。

• as long as 或 so long as
• as much as
• as of
• assertive
• assume
• assure
• assure 与 ensure
• astonish
• astound
• as well
• as well as
• as well...as
• as with
• at
• at
• at all
• at issue
• atmosphere
• at once
• at one's peril
• attention
• attention 与 caution
• at that
• at the cost of
• at the expense of