计算机英语PDF电子书下载

Unit One　Warming-up Lessons 1

Lesson One 1

Text A 2

Text B 4

Grammar Focus:The Tense and The Simple Present Tense 7

Lesson Two 9

Text A 11

Text B 12

Grammar Focus:The Simple Past Tense 15

Lesson Three 17

Text A 18

Text B 20

Grammar Focus:The Simple Future Tense and The Past Future Tense 23

Lesson Four 25

Text A 26

Text B 27

Grammar Focus:The Present Continuous Tense and The Past Continuous Tense 30

Lesson Five 32

Text A 33

Text B 36

Grammar Focus:The Present Perfect Tense and The Past Perfect Tense 40

Unit Two　Fundamental Computer and Network Knowledge 46

Lesson Six 46

Text A 46

Text B 47

Grammar Focus:The Passive Voice 51

Lesson Seven 55

Text A 55

Text B 58

Grammar Focus:The Attributive Clause 62

Lesson Eight 66

Text A 66

Text B 68

Grammar Focus:The Adverbial Clause 72

Lesson Nine 75

Text A 75

Text B 77

Grammar Focus:The Object Clause 80

Lesson Ten 83

Text A 83

Text B 86

Grammar Focus:The Subject Clause 89

Lesson Eleven 91

Text A 91

Text B 93

Grammar Focus:The Predictive Clause 96

Revision(1) 97

Lesson Twelve 100

Text A 100

Text B 102

Grammar Focus:The Direct Speech and The Indirect Speech 105

Lesson Thirteen 108

Text A 108

Text B 109

Grammar Focus:The Subjunctive Mood 112

Lesson Fourteen 116

Text A 116

Text B 117

Grammar Focus:The Inversion 120

Lesson Fifteen 122

Text A 122

Text B 124

Grammar Focus:The Appositive and The Parenthesis 127

Revision(2) 129

Unit Three Software Knowledge and Computer Application 131

Lesson Sixteen 131

Text 131

Grammar Focus:The Present Participle 136

Lesson Seventeen 138

Text 138

Grammar Focus:The Past Participle 143

Lesson Eighteen 144

Text 144

Grammar Focus:The Gerund 149

Lesson Nineteen 151

Text 151

Grammar Focus:The Infinitive 156

Lesson Twenty 160

Text 160

Grammar Focus:The Auxiliary and Modal Verb 163

Lesson Twenty-one 165

Text 165

Grammar Focus:Word Formation—Prefix 169

Lesson Twenty-two 173

Text 173

Grammar Focus:Word Formation—Suffix 177

Vocabulary List　词汇表 180

Appendix 1　基本语音知识 204

Appendix 2　基本语法知识 207

Appendix 3 不规则动词的过去式和过去分词 211