11．advise和advice
advise"勸告”(動詞)；advice"勸告”(名詞)。
12affect和effect
affect"影響”vt．，它的第二個意思是“假裝”，Though she attectes indifference，I Knew She was really very upset
effect n．“結果”，“效力”。vt．“產生”，“導致”，它比“to cause，t0 bring out’更為正式。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‘已經”。He had already had his hmeh．
14．altogether和all together
altogether(in total)“總共”，
all together意思是“in a group’。如：We put the sheep all together in one field．這兩個詞還可以分開。We put all the sheep together in one field．
15．besides和beside
besides意思是“in addition to”“加之，還有，另外”；而beside“在……旁邊”，“在……一側”。Duncan is the tall man standing beside my father．站在我爸爸旁邊的高個子男子是鄧肯。
16．coherence和cohesion
coherence"統一，一致性”；cohesion"結合力，團結”，The cohesion 0r molecules分子的結合力。，
17．compare with和 compare to
compare with‘和……比起來”
compare to"好比”。He compared the moon to a silver plate．他把月亮比成一個大銀盤。
18．impel和compel
impel"推動，驅使，激勵”。impel sb．t0 do sth．激勵某人做某事；
compel"強迫，脅迫，迫使”。compel sb．to oneg will強迫人服從自己。
19．complement和compliment
complement"補足(物)，補全”，“補足語”。
compliment"恭維話，贊辭，敬意”；Your presence is a great compliment．承蒙光臨，不勝榮幸。