seem用作連系動詞或不及物動詞，意為“似乎、好像、看來”。
“主語+seem+(to be)+表語 ”
此時seem為連系動詞，后直接接形容詞或to be+形容詞或名詞(短語)作表語，以說明主語的特征或狀態(tài)。如:
Tom seems (to be)a very clever boy. 湯姆看上去是一個很聰明的男孩。
Everything seems easy.一切似乎很容易。
注意:afraid，asleep，awake等表語形容詞不能直接跟在seem 之后，必須和seem to be 連用，如:They seem awake.(誤)應改為:They seem to be awake.
“主語+seem +不定式(或不定式的完成式)”
此句型中的seem 用作不及物動詞，不用在進行時態(tài)中，其與不定式一起構成復合謂語(不定式作賓語)。如:
a. The moon seems to change its shape. 月亮好像在變換形狀。
b. I seem not to be able to make him happy. 我似乎不能使他高興起來。
c. They seemed to be eating something. 他們好像在吃什么東西。
d. I seem to have caught a cold. 我似乎已經感冒了。
注意:seem 后跟不定式(短語)時，要注意不定式所表示動作發(fā)生的時間，以此來確定不定式的時態(tài)，如例c、d;seem 后不定式的否定式習慣上在seem 前加don’t ，也可以用seem not to...，如例b也可以說成:I don’t seem to be able to make him happy.
“seem +分詞”
a. Our teacher seemed stopped by the question. 我們老師似乎被問題難住了。
b. The news seems exciting. 消息似乎令人興奮。
注意:seem后用現(xiàn)在分詞還是過去分詞，取決于分詞本身的邏輯主語，如句子的主語是分詞的邏輯主語，用現(xiàn)在分詞，如例b;反之用過去分詞，如例a。
“seem+like+n/v-ing”
like在這里是介詞，此句式等于seem to be結構。如:
It seems like years since I saw you last time.自從上次見到你，好像過了幾年。
The girl seems like /to be a happy bird.那女孩好似一只快樂的小鳥。
“seem+ 介詞短語”
They seem in high spirits .他們似乎境界很高。
seem 常用于it作形式主語的“It seems /seemed that...”結構中
該結構中it作形式主語，“that...”是真正的主語。此結構可以用seem后接不定式來改寫。如:
It seems that you were lying. 好像你在說謊。
It seemed that he was ill， so I called in the doctor.
=He seemed (to be) ill， so I called in the doctor. 看來他病了，所以我請了醫(yī)生。
注意:It seems that... 從句中，that從句可以用陳述語氣，也可以用虛擬語氣;或者在seem后可以跟一個形容詞。如:
It seems impossible that he will be here tomorrow.他明天在這里好像不可能。
seem通常用在“It seems/seemed to sb (that)…”結構中，這種結構用來表示“行為”的主體。如:
It seems to us a good chance. 對我們來說似乎是一個好機會。
It seems to me everything is all right.對我來說似乎一切都不錯。
seem也常用于“ There seem(s) to be+名詞”結構中，to be可省略， seem的單復數形式要根據后面主語的名詞單復數形式而定。如:
a. There seems to be no need to wait longer.似乎沒有必要再等待了。
b. There doesn’t seem to be too much hope of our team beating theirs.看來我們戰(zhàn)勝他們隊沒有多大希望了。
注意:
(1)此結構中seem表示 “似乎有;好像有……”，可以和It seems as if...轉換。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 +名詞”這一結構的否定形式為“There seem(s) to be +no+名詞”，如例a; 或“There doesn’t seem to be +名詞”，如例b。
seem常用于由as if/though引導的從句中
a. It seems as if it was/were spring already.好像已經是春天了。
b. It seems as though our plan will be perfect.似乎我們的計劃很完美。
注意:這種句式中，如果從句所敘述的事情實現(xiàn)的可能性較大或可以被設想為事實，從句的謂語用陳述語氣，如例b;若實現(xiàn)的可能性小或根本不可能實現(xiàn)，從句用虛擬語氣，如例a。
seem 有時和人稱代詞I連用，意為“感到好像，覺得似乎”。如:
a. I seem unable to solve it right now. 看來我無法立即解決它。
b. I seem to have seen him somewhere before.我覺得以前在什么地方見過他。
