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seem，appear和look的用法比较重要，而且又难以区分，请仔细加以区别。
一、用seem和appear的句型：
1、It seems ／appears（to sb．）＋ that-clause
It seems ／appears to me that they are right．我觉得他们似乎是正确的。
It seemed ／appeared that he enjoyed the food very much．看来他好像很喜欢吃这种食品。
2、Sb．／Sth．seems ／appears ＋to do
He seems ／appears to be a musician．他似乎是一个音乐家。
She seemed ／appeared to have caught a cold．她好像感冒了。
上述两种句型可相互转换。
He seems ／appears to have known about the secret．（＝It seems ／appears that he has known about the secret．）他似乎已知道这个秘密。
There seems to be no difficulties to be discussed．看来没有什么难题要讨论。
There appears to have been a mistake．好像有错误。
二、使用look和seem的句型：
1、 It looks ／seems as if…表示“看起来…；似乎…”。使用该句型应注意：若从句表示的是很可能实现的事情，从句谓语用陈述语气；若从句表示的是与事实相反的、假设或实现的可能性很小的事情时，则从句谓语要用虚拟语气。
It seems as if he has been at the scene of the crime.似乎他好像在犯罪现场。
When a pencil is partly in a glass of water，it looks as if it were broken．如果把铅笔的一部分放入水杯中，它看上去似乎是断了。
2、 Sth．looks ／seems like…
The building looks like a school．这建筑物看起来像所学校。
It seems like years since I last saw you．自从我上次见到你好像有几年了。
三、seem，appear和look的区别：
seem，appear和look虽都有“看起来像”的意思，但三者仍有差别。seem常含有基本接近事实的意义；appear多指从外表判断，一般与事实不符；look则着重指从外表而得到的印象，所得出的判断有可能与事实相符，也有可能与事实不符。
一、用seem和appear的句型：
1、It seems ／appears（to sb．）＋ that-clause
It seems ／appears to me that they are right．我觉得他们似乎是正确的。
It seemed ／appeared that he enjoyed the food very much．看来他好像很喜欢吃这种食品。
2、Sb．／Sth．seems ／appears ＋to do
He seems ／appears to be a musician．他似乎是一个音乐家。
She seemed ／appeared to have caught a cold．她好像感冒了。
上述两种句型可相互转换。
He seems ／appears to have known about the secret．（＝It seems ／appears that he has known about the secret．）他似乎已知道这个秘密。
There seems to be no difficulties to be discussed．看来没有什么难题要讨论。
There appears to have been a mistake．好像有错误。
二、使用look和seem的句型：
1、 It looks ／seems as if…表示“看起来…；似乎…”。使用该句型应注意：若从句表示的是很可能实现的事情，从句谓语用陈述语气；若从句表示的是与事实相反的、假设或实现的可能性很小的事情时，则从句谓语要用虚拟语气。
It seems as if he has been at the scene of the crime.似乎他好像在犯罪现场。
When a pencil is partly in a glass of water，it looks as if it were broken．如果把铅笔的一部分放入水杯中，它看上去似乎是断了。
2、 Sth．looks ／seems like…
The building looks like a school．这建筑物看起来像所学校。
It seems like years since I last saw you．自从我上次见到你好像有几年了。
三、seem，appear和look的区别：
seem，appear和look虽都有“看起来像”的意思，但三者仍有差别。seem常含有基本接近事实的意义；appear多指从外表判断，一般与事实不符；look则着重指从外表而得到的印象，所得出的判断有可能与事实相符，也有可能与事实不符。