用作定语
▲～+n.
The guests wore casual clothes.客人们穿着便服。
She's a very casual person.她是一个很随便的人。
The two old friends had a casual meeting.这两位老朋友不期而遇。
He earns a living by casual labor.他靠做临时工为生。
用作表语
▲S+be+～
His attitude to work is rather casual.他工作态度相当马虎。
用作宾语补足语
▲S+V+O+～
This sense of an audience made him deliberately casual in his bearing.意识到听众在场,他故意摆出一副漫不经心的态度。
