be+of+adj.+n.的用法这种用法我不太习惯,例如:They aren't of good quality.谁能帮我讲讲?

问题描述:

be+of+adj.+n.的用法
这种用法我不太习惯,例如:They aren't of good quality.谁能帮我讲讲?

It is of great importance
=ti is important
they aren't of good quality means they are not in good qualit