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appear, look, seem 的區別

三者均可用作連系動詞，意為“好像”、“似乎”等，區別如下：

1. 從詞義上看：look 指視覺印象；appear 指外表給人的印象；這兩者可能是真象也可能是假象，appear 的不確定性更大一些。seem 側重指根據某種跡象作出的推斷，也不一定是事實。

2. 從句型搭配和用法上看：

(1) 三者均可后接不定式，但 look 之后一般只限于 to be (且較少見)。如：

正：He seems [appears，looks] to be tired. 他好像很累了。

正：He seems [appears] to have travelled a lot. 他似乎去過不少地方。

誤：He looks to have travelled a lot.

(2) look, seem 之后可接介詞 like，但 appear 之后一般不能。如：

He looks [seems] like a fool. 他看起來像個大傻瓜。

(3) appear 和 seem 不用于進行時態，但 look 有時可這樣用。如：

正：He looks [is looking] well. 他看上去氣色不錯。

誤：He is seeming [appearing] well.

(4) 三者均可用于 it 開頭的句子，且三者之后均可接以 as if 或 as though 引導的從句，另外 appear 和 seem 之后還可接 that 引導的從句。如：

It looks [seems，appears] as if he has lost interest in his job. 看來他對自己的工作已失去了興趣。

It seems [appears] that he is very tired. 他似乎很累了。

注：后接 that 從句時，有時可用 so，not 代之。如：

A：Are they reliable? 他們可靠嗎?

B：It seems [appears] so (not). 似乎是可靠的(不可靠)。

另外，比較以下同義句型：(m.52ysedu.com)

It seems [appears] that he is ill.＝He seems [appears] to be ill. 他似乎病了。