1.accept, except, accept 是动词,except 是介词。 
F:They excepted my invitation to dinner. 
T:They accepted my invitatipn to dinner. 
F:Everyone attended the meeting accept the secretary. 
T:Everyone attended the meeting except the secretary. 
2.advice, advise, advice 是名词,advise 是动词。 
F:His advise was very useful. 
T:His advice was very useful. 
F:I was adviced to purchase an economical car. 
T:I was advised to purchase an economical car. 
3.affect, effect. affect 是动词; 意为influence. effect 可以是动词也可以是名词。动词effect意为cause to happen, 名词effect意为the result。 
F:Pollution effects everyone. 
T:Pollution affects everyone. 
F:Your tears do not effect me. 
T:Your tears do not affect me. 
F:What is the affect of that drug? 
T:What is the effect of that drug? 
5.most ,almost most 是形容词almost是副词。 
F:Most everyone has a desire to succeed. 
T:Almost everyone has a desire to succeed. 
F:The student was most finished when the bell rang. 
T:The student was almost finished when the bell rang. 
F:The children ate most all of the pie. 
T:The children ate almost all of the pie.  
--The children ate most of the pie. 
6. already, all ready. already 意为 before the time specified. all ready 意为 completely prepared。 
F:The movie had all ready begun by the time we arrived. 
T:The movie had already begun by the time we arrived. 
F:Are you already to go? 
T:Are you all ready to go? 
7.altogether, all together. altogether意为thoroughly. Alt together 意为 in a group。 
F:All together confused, he asked me to explain the word again. 
T:Altogether confused, he asked me to explain the word again. 
F:The passengers stood altogether in the station. 
T:The passengers stood all together in the station. 
8.amount,number,amount指不可数名词,number指不可数名词。 
F:He checked out a large amount of books from the library. 
T:He checked out a large number of books from the library. 
F:I was amazed by the amount of people present. 
T:I was amazed by the number of people present. 
F:Elephants can consume a large number of food. 
T:Elephants can consume a large amount of food. 
9. anywheres, somewheres, everywheres. 去掉s。 
F: We can talk anywheres. 
T:We can talk anywhere. 
F:I lost my umbrella somewheres in the store. 
T:I lost my umbrella somewhere in the store. 
10. about, around. around指地点,about意为approximately 
F: The mail arrived around ten o’clock. 
T:The mail arrived about ten o’clock. 
F:He is around six feet tall. 
T:He is about six feet tall.