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?

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?
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?

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