keep ��

　　［誤］ She was keeping something to her father.��

　　［正］ She was keeping something from her father.��

　　［析］ "對某人隱瞞某事"要用"keep something from somebody"句型。��

　　［誤］ He kept to repeat the word again and again.��

　　［正］ He kept repeating the word again and again.��

　　［析］ keep doing something為連續(xù)不斷地做某事。有時(shí)可以與keep on doing something互換。它們的區(qū)別在于keep doing something意為該動作一直不停地在進(jìn)行中，如： When the train started, she kept waving her hand. 而keep on doing something則表示該動作可能停停頓頓但卻一直在進(jìn)行中，如： He kept on making the same mistakes in grammar.

　　［誤］ We must keep up the times.��

　　［正］ We must keep up with the times.��

　　［析］ 這句話意為"我們必須趕上時(shí)代"，keep up with是"趕上"之意，而keep up則是"堅(jiān)持下去"的意思，如： Keep it up, don‘t stop now!��

　　key ��

　　［誤］ I lost the key of the door.��

　　［正］ I lost the key to the door.��

　　［析］ 英語中講某某的東西一般要用of，而key, entrance, answer則多用to，如："門的鑰匙"為key to the door, "高速公路入口"為entrance to the highway, "問題的答案"為the answer (key) to the question.��

　　kind ��

　　［誤］ This kind of books are not good.��

　　［正］ This kind of books is not good.��

　　［析］ kind在這種句式中應(yīng)作為主語，如果講Those kinds of books are very good. 則是正確的。��

　　kind sort type ��

　　kind和sort為同義詞，意為"種類"，而type則為"型號"，如： What type of this car do you want?(你想要這種車的什么型號?)��

　　knock ��

　　［誤］ Someone was knocking the door.��

　　［正］ Someone was knocking at the door.��

　　［析］ knock雖可以作及物動詞，如： The car knocked a hole in the fence. 但作"敲門"講一定要用作不及物動詞： knock at (on) the door.��

　　know ��

　　［誤］ I want to know to play this game.��

　　［正］ I want to know how to play this game.��

　　［析］ 要注意英語中在不定式前加疑問代詞或疑問副詞的用法。如：I want to know how to do it / what to do / when to do it / where to go.��

　　know know of ��

　　I know him.為"我很了解他。"而I know of him. 則為"我聽說過他。"同樣的用法還有hear和hear of這一詞組。��