of +抽象名次 相当于形容词 抽象名词如（honesty love thirsty improvement honour cancer）
具体用法
a man of sense =sensible man
a man of wealth =a wealthy man
a man of experience =an experienced man
you advice is of great value
i met amber by accident in dewai
of +表示大小长短 深度 年龄 颜色的名词 可以表示表语 补足语及宾语
the lake is about 60meters in depth
our classromm is about 3 meters in length
类似短语
in fact =actually
in anger=angrily
on time =punctually
in private =privately
by chance=by accident=accidentally
in brief=briefly
with care =carefully
in wonder=wonderfully
with patience = patiently