My father was in the army two years ago.This book will be of great use to you.句子结构,词的作用
问题描述：
My father was in the army two years ago.This book will be of great use to you.句子结构,词的作用
答
My father was in the army two years ago
My father 主语
was 充当谓语
in the army 介词短语充当表语.‘在军队,参军’ 的意思.
two years ago 这个算是介词短语充当时间状语,“两年前”的意思.
翻译：我的父亲两年前在军队（即退役两年的意思）
This book will be of great use to you
This book 主语
will be 充当谓语
be 动词后面的充当表语.
be of + adj+n 是一种固定结构,不太常用,但偶尔可以看到,可以把 of great use 替换成 greatly useful .
be useful to sb 对某人很有用.固定搭配
翻译：这本书对你非常有用TO YOU 是什么成份 是补语吗是的~~