11.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.

12.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.
--We visited California. Besides, we visited Oregon.

13.between, among. between 用于两个人或两件事物,among用于三个以上的人或物.
F:The law was debated between the senators, the representatives, and the judges.
T:The law was debated among the senators, the representatives, and the judges.
F:There is a dispute between the local union members.
T:There is a dispute among the local union members.
F:You must choose among the two plans.
T:You must choose between the two plans.

14.but, hardly, scarcely.这几个词带有否定意味，不要再与另外否定性的词连用。
F:I couldn’t hardly see him in the dark.
T:I could hardly see him in the dark.
F:She didn’t earn but thirty dollars last week.
T:She earned but thirty dollars last week.
F:He doesn’t spend scarcely any money on clothes.
T:He spends scarcely any money on clothes.

15.different from（不是 different than).
F:The result was much different than what I expected.
T:The result was much different from what T expected.

16.do, make.这两个词含义不同。
F:They did a peaceful agreement.
T:They made a peaceful agreement.
F:I never do fun of other people.
T:I never make fun of other people.
F:It’s time to do the sandwiches.
T:It’s time to make the sandwiches.
F:Rarely does he do a mistake.
T:Rarely does he make a mistake.