✔ 最佳答案
首先,注意 appear 並沒有 passive voice(被動式),故此 appearing 跟 appeared 都是 active voice(主動式) 來的。
而在此兩句中,appearing 是個 participle,而 appeared 則是普通的 past tense。
在第一句中,appearing 是用來修飾 a comic book superhero,而 a comic book superhero appearing in publications by Marvel Comics 這句 phrase 則用於修飾 The Hulk 這個 subject。根據 SVO 句法,這句的 V(動詞,verb)是 is(順道一提,object 是 fictional character),故 appear 只能以 participle 形式出現,否則這句的後半部分就會獨立成句(The Hulk is a fictional character. A comic book superhero appeared in publications by Marvel Comics.),失去了修飾 The Hulk 之作用。
在第二句中,由 first appeared in The Incredible Hulk 前面那個 and 可見,這句是由兩個獨立句子(The character was created by Stan Lee and Jack Kirby 和 The character first appeared in The Incredible Hulk)組成。而從 The character first appeared in The Incredible Hulk 的 SVO 句法可見,V 是 appeared,故它並不是如第一句的 appearing 般只作修飾用,非必要,而是一句句子的基本元素。
希望幫到你。
2013-06-26 12:09:05 補充:
這個沒有方法,只能靠記。