【正文】 e type and the quite plex sentences .This kind of sentences show that the sentence is long, the subordinate clauses are many and the sentence type is special .When students meet long sentences, they do not clear sentence structure, and cannot understand the sentence means. Encounter pound sentence, it is hard to understand the meaning and it is easy to cause error. Each kind of syntax phenomena and abbreviation sentence has the, tremendous influence for understanding the sentences. This indicated that the plex sentence type has the varying degree influence to student39。s second language acquisition theory, with munication as the core of Krashen39。ABSTRACT 錯(cuò)誤!未定義書簽。Contents IIntroduction 11. Overview of Krashen’s SLA Theory 2 and Learning Hypothesis 2 Natural Order Hypothesis 3 Monitor Hypothesis 3 Input Hypothesis 4 Hypothesis 42. Current Situation and Main Problems of English Reading Teaching in Senior High School 5 Students’ Current Situation and Main Problems 5 Unfamiliar to Vocabulary and Grammar 5 Lack of Background Knowledge 6 of Motivation 6 Poor Reading Habits 6 Teachers’ Current Situation and Main Problems 6 Teaching Concept and Single Teaching Mode 6 Lack of Reading Strategy and Skill’s Direction 7 of Students’ Reading Interest 7 Relationship between Teachers and Students 8 Lack of Interaction between Teachers and Students 8 of Studentcenter 9 of Krashen’s SLA Theory to English Reading Teaching in Senior High School 9 of SLA Environment 9 the Traditional Teaching Concept 9 Creating Natural Communicative Environment 10 Carrying out a Variety of Class Activities 11 of Acquisition and Learning 12 Intensive Reading and Learning 12 Reading and Acquisition 13 Combination of Intensive and Extensive Reading 14 to Quantity and Quality of Input 15 Using “i+1” Model to Comprehensible Input 15 Providing Enough Quantity of the Best Language Input 16 Improving Culture Input and Language Comprehension 17 to Emotional Factors to Stimulate the Motivation of Students 19 Selecting Appropriate Reading Materials 19 Selecting Appropriate Teaching Methods 19 Enhancing Students’ Selfconfidence and Reducing Anxiety 20Conclusion 22Bibliography 23AcknowledgementsIIIntroductionAlong with China and foreign economic and technological exchange, the increasingly frequent English in people39。s second language acquisition theory in English teaching practice for opened the new perspective, also plete curriculum implicate the ministry of education for English learning requirements.1. Overview of Krashen’s SLA TheoryKrashen’s SLA theory is a prehensive one, consisting of five interrelated central hypotheses: the acquisitionlearning hypothesis, the natural order hypothesis, the monitor hypothesis, the input hypothesis and the affectivefilter hypothesis, with input hypothesis as the core. and Learning HypothesisKrashen assumed that second language learners have two independent ways of developing the knowledge of a second language acquisition and learning. Both are technical terms in the Monitor Theory. The first way is language acquisition ,a process similar ,if not identical to the way children develop ability in their first language .Language acquisition is a subconscious process 。s reading .For this, the true reason is the student cannot grasp the grammar knowledge, cannot make the correct analysis to the whole sentence firm, thus it affects students to hold the whole sentence meaning. Lack of Background KnowledgeInvestigation, the author known that many students mastered a large vocabulary and a plete set of grammar knowledge, but there also will be many difficulties in reading prehension and linguistic expressions .The immediate reason cause these questions is the students lack of the west cultural background. There are a lot of differences of languages, national, cultural tradition and thinking mode that lead to language munication barrier. This also brings barrier in reading. of MotivationInterest is the best teacher of study. For high school students, reading is one of the most important skills, but students didn39。s interest in the reading will decrease gradually, and then will be restrained. Relationship between Teachers and Students Lack of Interaction between Teachers and StudentsClass observation found some teacher even cannot call out student’s name in the class. It is not difficult to imagine that when a teacher call a student who , what psychological response the student will be. Teacherstudent relationship apathy has severely affected the teaching effect. Many students thought themselves to be neglected, so their manner will be very negative when they attend the class, do not harass the classroom discipline is maybe a lucky thing, even more mentioned they will say something that coordinated with the teaching. Also some students, because their study is not good, will feel inferior or the anxious mood is thick, in addition ,the teacher has not been able to unblock promptly, thus this creates the vicious circle which result more students not willing to study. Good teachers and students sentiment is the key to successful teaching, so emotional munication between teachers and students is important. Teachers should understand the student39。 and the students will take part in the class positively. At the same time, the teacher should create opportunities for students in different levels to get them participate in classroom teaching actively, try to train the students39。s teaching as the main body, students just passive recipients. Such situation has existed now. The learner is the knowledge constructor, and their knowledge construction activity is deciding the teaching effect directly, therefore, they are the learning process masters. In short, the student is the center in the whole teaching activity. In class process teachers should break the tradition education