爱华网appear强调自身表现出，流露出；
seem是别人从一些现象分析出；
look是从外表，外貌上看出；
1：look,seem可后接like介词短语，appear不能！
2：look可用于sb look as if...及it lokks asif...；而seem/appear后跟从句时，主语只能是it!!
3：look,seem可后接as if/though从句，appear较少出现这种情况！！
4：appear,seem可后接that从句，look不能！！
5：appear,seem可后接不定式，look不能！！
6：appear,seem可用于there引导的结构中，look不能！！
巩固练习：
1.He _____to be your friend but I doubt if heis.
A.looks B.seems B.appears D. is appearing.
2.There _____to have been a house here.
A.seems B.looks C.appears D. A and B
3.He knows Harbin very well. It _____as if he hadbeen there before.
A. seems B. isappearing C. looks D. A and C
4.Tom:Is it already three o’clock?
Mary: Yes. It _____that we won’tget there on time.
A. seems B.looks C. had appeared D. haslooked
5.It _____like months ______he left for the UnitedStates. I have been missing him very much. A.looks, before B. seems, sinceC. appears, when D. seems, after
6.You seems ______this film before because youcould tell us about it in class.
A. to haveseen B. to see C. havingseen D. to be seen
7.Mary: Do you know why he _____very sad thesedays?
Tom: Well. His father passed awaylast week.
A. has beenseeming B. isappearing C. has beenlooking D. has seemed
8. He _____very happy because he passed the examthis time.
A.seemed B. looked tobe C.appeared D. All ofabove
9. Which of the following is wrong? ______.
A. It appears that he has manyfriends in Beijing.
B. He appears to have manyfriends in Beijing.
C. It appears to me that he hasnever read this novel.
D. It appears like years sincehe went west.
10.Which of the following is wrong? ______.
A. It seems as there will be anelection soon.
B. There seem to be hope thatbusiness will get better.
C. It would not seem proper todo so.
D. He seemed to have been anactor.
参考答案：
1. C 2. D 3.D 4. A 5. B6. A 7. C 8.D 9. D 10. B
注：第10小题中的C would seem比seems说话的语气更婉转
