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 economical¹ 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 specified². all ready 意为 completely³ 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 confused⁴, 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 amazed⁵ by the amount of people present.
T:I was amazed by the number of people present.
F:Elephants can consume⁶ 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 lighting⁷.
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 California⁸ beside Oregon.
T:We visited California besides Oregon.
OR
We visited California. Besides, we visited Oregon.