Types of Sentence errors：
1.Sentence fragments
A grammatically complete sentence has a verb with its subject.Structurally it must be an independent unit, capable of standing alone.The sentence fragment means simply that dependent units such as phrases, clauses, appositives and other such groups of words are mistaken as sentences.（片段句）
2.Run-on sentence, esp.a comma splice
A run-on sentence puts together two or more sentences with no mark of punctuation between them.When two complete sentences run together with only a comma between them, it is called a run-on sentence.（误用逗号连接句） 3.Misplaced or dangling modifier
A carele use of verb phrases like participle, gerund, infinitive, etc.results in a construction usually known as the dangling modifier.A phrase is said to be dangling if it is not tied to something it modifies.（垂悬句）
4.The illogical or faulty parallelism
The false parallels, that is, using parallel structure for ideas that are not parallel, should be avoided.A subordinate which or who clause should not be carelely joined to a main clause by “and”.Correlatives such as both---and, either---or, etc.should be used only before sentence elements that are parallel in form.（误用平行句法）
5.The shift in point of view
Any unneceary and illogical shift in point of view should be avoided.Unneceary shift from active to paive voice are undesirable.A needle shift in number and persons should be avoided.Shifts in subject, perspectives, or tense should be avoided.（角度随意转换）
Identify the errors in the following sentences and correct them:
1.The basketball game was cancelled.Because half of the players were in bed with the flu.
2.These snakes are dangerous，however, most snakes are quite harmle.
3.Looking out toward the horizon, she saw only the old cabin in which Mary had been born.A single cottonwood that had escaped the drought.The apparently boundle expanse of sunburned prairie.
4.With the knowledge that, although the documents have been stolen, they have not yet been seen by a foreign agent.
5.Last year, after graduating from high school, my father put me to work in his office. 6.To appreciate the poem, it must be read aloud.
7.I helped my mother wash clothes last Sunday, thus causing me to mi that film.
8.Driving acro the state, many beautiful lakes were seen.
9.Unselfish people not only are happier but they are more succeful.
10.I finally realized that my daydreaming was not making me beautiful, slender, or friends.
11.He is a man of wide experience and who is also very popular with the farmers.
12.I am interested in electronics, because it is a new field and which offers interesting opportunities to one who knows science.
13.We swept the room carefully, and the furniture and shelves were dusted.
14.If one’s mouth is dry, eat a lump of sugar or chew gum.
15.You must make yourself interesting to the group that listens to you and are constantly trying to detect your mistakes.
16.No one swam in the lake that summer，a little boy had dropped his pet into the water.
17.Our new car not only is more economical but also it is more comfortable than that old one.
18.Tim and Rita decided to send their daughter to college on the day she was born.
19.He believed neither in himself nor did he believe in others.
20.The father ordered a meal for his family ranging from fried shrimp to chopped beef.
21.Although tired and hungry, the drill sergeant would not let us rest.
22.Bloomsbury is more than just the home of great artists, it is also the home of great art.
