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?

4.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.
OR
The children ate most of the pie.

5. 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?

6.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.

7.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.

8. 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.

9. 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.

10.because, because of.because是从属连词后跟从句,because of是介词，后跟名词或名词短语。

F:The game was canceled because of it was raining.
T:The game was canceled because of the rain.
F:We could not see because the poor lighting.
T:We could not see because the lighting was poor.
F:He can move the furniture easily because of he is strong.
T:He can move the furniture easily because of his strength.

11.beside, besides.beside 意为next to,besides意为in addition to.

F:Beside Tommy, Helen and I attended the concert.
T:Besides Tommy, Helen and I attended the concert.
F:He was sitting besides the pretty girl.
T:He was sitting beside the pretty girl.
F:We visited California beside Oregon.
T:We visited California besides Oregon.
OR
We visited California. Besides, we visited Oregon.