be + of + 名词[原句展示] This can take the form of reading and listening materials which must be of the highest quality.此结构中的名词常为抽象名词如： value, use, help, interest, benefit, honor, courage, fame, ability, nature, beauty, wealth 等，这类名词前可用 no, some, any, little, much, great 等词修饰，表示程度of + 抽象名词”构成的短语相当于该抽 象名词的同根形容词如：Theory without practice is of little help.没有实践的理论是没有什么用的此外，size, price, age, shape, length, depth, color, weight, width, height ，quality 等 也可以用于该结构，这类名词前可用 a(n), the, the same, different, good 等修饰。
如：Coins may be of different sizes, weights, shapes, and of different metals.硬币的大小、重量、形状可能不同，铸造用的金属也可能不一样[小试] 改写下列句子，使两句句意相同或相近1. The English-English dictionary is very helpful to me.The English-English dictionary is _____ _____ _____ to me.2. I am sure my information is quite valuable.I am sure my information is _____ _____ _____.Key: 1. of much help 2. of great value。