appear ⁵

这又是一个歧义句。句子的歧义是由于appear具有不同的语义和语法功能而产生的。A. appear用作实义动词，意为“出现”：

1. Two men suddenly appeared... (EED) 突然出现了两个人……

2. His new book will be appearing in the shops very soon. (LDCE) 他的新书很快就会在书店里出现(出售)。

按照这种理解,上面句子的意思是:

他来到时，情绪很糟（他情绪很糟地出现了）。

B. appear 用作连系动词, 意为“看来好像”“显得”“似乎”:

1. There appeared to be only one room. (Sinclair) 似乎只有一个房间。

2. Mr. Gilmore is one of those men who appear to be friendly, however, it is very hard to deal with him. (全国研考) 吉尔摩先生是那种外表上显得很友好的人，然而和他打交道却很难。

按照这种理解,上面句子的意思是:

他显得情绪很不好。

as appears/as it appears 见 it $^{20}$

don't appear/appear not 见 seem, appear $^{4}$

apply at 见 apply for