UNIT 1 SIMPLE PRESENT ACTIVE 1
UMT 2 SIMPLE PRESENT PASSIVE 16
UNIT 3 SIMPLE PAST ACTIVE AND PASSIVE 30
UNIT 4 -ing FORMS I 45
UNIT 5 REVISION OF UNITS 1—4 61
UNIT 6 PRESENT PERFECT；PRESENT CONTINUOUS 75
UNIT 7 INFlNITIVES；-ing FORMSⅡ 94
UNIT 8 ANoMALOUS FINITES 115
UNIT 9 PAST PERFECT；CONDITIONALS 140
UNIT 10 REVISION OF UNITS 6-9 166
UNIT 11 GENERAL REVISION UNIT 184
UNIT 12 GENERAL REVISION UNIT 207
APPENDIX A COMMON PREFIXES AND SUFFIXES 235
APPENDIX B COMMON ABBREVIATIONS 246
APPENDIX C BASIC WORDS 249
APPENDIX D KEY TO EXERCISES 351