作补语的形容词：

　　(1) be＋形容词＋介系词：由此结合而成的片语，有些等于及物动词。

　　I am fond of skiing. = I like skiing.

　　He is afraid of it. = He fears it.

　　注：其他如：be capable of; be concerned with; be (un)familiar with (to); be late for; be subject to; be worthy of; etc.

　　(2) 某些已转化为形容词的过去分词，其后通常接at; about; with; in; of等介词。

　　John is interested in English grammar.

　　He was surprised at her behaviour.

　　(3) be＋形容词＋介系词：可接〔代）名词，动名词，或名词子句，但名词子句若是that子句须省略介词，因that子句不可直接作介词的受词。

　　She was not aware of the facts.

　　She was not aware (of) how much her husband earned.

　　She was not aware that there is danger.

　　(4) It+ be ＋形容词＋that子句

　　It is true that she never came.

　　此类形容词有：certain; likely; obvious; plain; possible; true; etc.

　　(A) that子句中的假设法。

　　It is appropriate that he (should) get the post. （should可省略〕

　　(B) 人称形容词亦可接其他连接词引导的子句。

　　I'm not sure why he came.

　　I'm not clear where she went.