"don't be a silly"
"gave me a cockamamie reason for not going" "wore a goofy hat" "a silly idea" "some wacky plan for selling more books"
"a dizzy blonde" "light-headed teenagers" "silly giggles"
"how silly an ardent and unsuccessful wooer can be especially if he is getting on in years"
"knocked silly by the impact" "slaphappy with exhaustion"
误 It was silly for you to make such a mistake.
正 It was silly of you to make such a mistake.
析silly常用于It is/was silly of sb to- v 的结构中,表示“做…的事的人是很傻的”。在这种句型中,不能用介词for代替of引出逻辑主语。