11．advise和advice
advise"劝告”(动词)；advice"劝告”(名词)。
12affect和effect
affect"影响”vt．，它的第二个意思是“假装”，Though she attectes indifference，I Knew She was really very upset
effect n．“结果”，“效力”。vt．“产生”，“导致”，它比“to cause，t0 bring out’更为正式。His aim was to effect a radical change in the party structure．
13．all ready和already
all ready意思是"COBpletely prepared’
already‘已经”。He had already had his hmeh．
14．altogether和all together
altogether(in total)“总共”，
all together意思是“in a group’。如：We put the sheep all together in one field．这两个词还可以分开。We put all the sheep together in one field．
15．besides和beside
besides意思是“in addition to”“加之，还有，另外”；而beside“在……旁边”，“在……一侧”。Duncan is the tall man standing beside my father．站在我爸爸旁边的高个子男子是邓肯。
16．coherence和cohesion
coherence"统一，一致性”；cohesion"结合力，团结”，The cohesion 0r molecules分子的结合力。，
17．compare with和 compare to
compare with‘和……比起来”
compare to"好比”。He compared the moon to a silver plate．他把月亮比成一个大银盘。
18．impel和compel
impel"推动，驱使，激励”。impel sb．t0 do sth．激励某人做某事；
compel"强迫，胁迫，迫使”。compel sb．to oneg will强迫人服从自己。
19．complement和compliment
complement"补足(物)，补全”，“补足语”。
compliment"恭维话，赞辞，敬意”；Your presence is a great compliment．承蒙光临，不胜荣幸。