seem用法

A是过去式，B是一般现在时， 这里应该用A，因为从句中knew 是过去式。

用法：1、seem(系动词）+形容词eg:He seems very angry.他好像十分生气2、seem+名词eg:He seems a nice man.他看起来是个好人3、seem like.意为“好像,似乎.”eg:It seemed like not a bad idea at the time.当时这主意好像不错4、seem to do sth 意为“似乎”eg:I seem to have left my book at home.我大概是把书忘在家里了5、It seems that+从句 意为“看起来好像.”eg:It seemed that he was very happy.他看上去好像很高兴同义词辨析：look appear seem 【词义：看似，看起来】

seem用法如下：seem用作连系动词或不及物动词,意为“似乎、好像、看来”。“主语+seem+(to be)+表语 ”此时seem为连系动词,后直接接形容词或to be+形容词或名词(短语)作表语,以说明主语的特征或状态。如:Tom seems (to be)a very clever boy. 汤姆看上去是一个很聪明的男孩。Everything seems easy.一切似乎很容易。注意:afraid,asleep,awake等表语形容词不能直接跟在seem 之后,必须和seem to be 连用,如:They seem awake.(误)应改为:They seem to be awake.“主语+seem +不定式(或不定式的完成式)”此句型中的seem 用作不及物动词,不用在进行时态中,其与不定式一起构成复合谓语(不定式作宾语)。如:a. The moon seems to change its shape. 月亮好像在变换形状。b. I seem not to be able to make him happy. 我似乎不能使他高兴起来。c. They seemed to be eating something. 他们好像在吃什么东西。d. I seem to have caught a cold. 我似乎已经感冒了。注意:seem 后跟不定式(短语)时,要注意不定式所表示动作发生的时间,以此来确定不定式的时态,如例c、d;seem 后不定式的否定式习惯上在seem 前加don"t ,也可以用seem not to...,如例b也可以说成:I don"t seem to be able to make him happy.“seem +分词”a. Our teacher seemed stopped by the question. 我们老师似乎被问题难住了。b. The news seems exciting. 消息似乎令人兴奋。注意:seem后用现在分词还是过去分词,取决于分词本身的逻辑主语,如句子的主语是分词的逻辑主语,用现在分词,如例b;反之用过去分词,如例a。“seem+like+n/v-ing”like在这里是介词,此句式等于seem to be结构。如:It seems like years since I saw you last time.自从上次见到你,好像过了几年。The girl seems like /to be a happy bird.那女孩好似一只快乐的小鸟。“seem+ 介词短语”They seem in high spirits .他们似乎境界很高。seem 常用于it作形式主语的“It seems /seemed that...”结构中该结构中it作形式主语,“that...”是真正的主语。此结构可以用seem后接不定式来改写。如:It seems that you were lying. 好像你在说谎。It seemed that he was ill, so I called in the doctor.=He seemed (to be) ill, so I called in the doctor. 看来他病了,所以我请了医生。注意:It seems that... 从句中,that从句可以用陈述语气,也可以用虚拟语气;或者在seem后可以跟一个形容词。如:It seems impossible that he will be here tomorrow.他明天在这里好像不可能。seem通常用在“It seems/seemed to sb (that)…”结构中,这种结构用来表示“行为”的主体。如:It seems to us a good chance. 对我们来说似乎是一个好机会。It seems to me everything is all right.对我来说似乎一切都不错。seem也常用于“ There seem(s) to be+名词”结构中,to be可省略, seem的单复数形式要根据后面主语的名词单复数形式而定。如:a. There seems to be no need to wait longer.似乎没有必要再等待了。b. There doesn"t seem to be too much hope of our team beating theirs.看来我们战胜他们队没有多大希望了。注意:(1)此结构中seem表示 “似乎有;好像有……”,可以和It seems as if...转换。如:There seem to be a lot of things to do.=It seems as if there are a lot of things to do.(2)“Thereseem(s) to be +名词”这一结构的否定形式为“There seem(s) to be +no+名词”,如例a; 或“There doesn"t seem to be +名词”,如例b。seem常用于由as if/though引导的从句中a. It seems as if it was/were spring already.好像已经是春天了。b. It seems as though our plan will be perfect.似乎我们的计划很完美。注意:这种句式中,如果从句所叙述的事情实现的可能性较大或可以被设想为事实,从句的谓语用陈述语气,如例b;若实现的可能性小或根本不可能实现,从句用虚拟语气,如例a。seem 有时和人称代词I连用,意为“感到好像,觉得似乎”。如:a. I seem unable to solve it right now. 看来我无法立即解决它。b. I seem to have seen him somewhere before.我觉得以前在什么地方见过他。

你好。关于初中阶段seem用法和固定搭配是主语+seem+(to be)+表语，这里的意思就是说明主语的特征或状态，表语多为名词或形容词，有时是其他的词或短语。还有一种是主语+seem+不定式，这个意思是在这个句型里，句型中的seem与不定式一起构成复合谓语。还有，It seems+that从句。这个句型在初中阶段就经常使用，因为it是形式主语，that引导主语从句。一般来说，seem的词性是动词，在用作动词时多是用作不及物动词，表示“似乎；好像；看来”的意思，在接名词作表语时，如名词前有形容词修饰，to be也可以。

1.(tosb)(tobe)sth|~likesth，不进行时，涉及推断时用，意思像，似乎，看来。 2.例句：Youseemhappy.你看起来很高兴。 3.to+动词的不定式，用以缓和语气时用，意思为感到好像，觉得似乎。 4.例句：Iseemtohaveleftmybookathome.我大概是把书忘在家里了。 5.itseems|itwouldseem，表示不确切或客气时用，意思为看来好像，似乎。 6.例句：Itwouldseemthatweallagree.我们大家似乎都同意。

seem可用作连系动词或不及物动词，意为“似乎；好像”，其常见用法现归纳如下：主语+seem+形容词，表示主语似乎；主语+seem+（tobe）+表语；主语+seem+不定式；Itseems+that从句；There+seemtobe+名词。seemto看起来;似乎;好像;看上去；seemlousy似乎棘手;似乎糟糕;看上去乱糟糟。

1、(to sb) (to be) sth | ~ like sth，不进行时，涉及推断时用，意思像，似乎，看来。 例句：You seem happy.你看起来很高兴。 2、to+动词的不定式 ，用以缓和语气时用，意思为感到好像，觉得似乎。 例句：I seem to have left my book at home.我大概是把书忘在家里了。 3、it seems | it would seem，表示不确切或客气时用，意思为看来好像，似乎。 例句： It would seem that we all agree.我们大家似乎都同意。