Unit1 Simple Present 1
Opening Task 1
Focus 1 Verbs in the Simple Present Tense（Use） 2
Focus 2 Simple Present Tense（Form） 2
Focus 3 Showing How Often Something Happens（Form/Meaning） 4
Focus 4 Talking About Facts（Use） 11
Use Your English Activities 13
Unit2 Present Progressive and Simple Present 18
Opening Task 18
Focus 1 Present Progressive：Actions in Progress（Use） 20
Focus 2 Present Progressive（Form） 21
Focus 3 Simple Present or Present Progressive?（Use） 22
Focus 4 Verbs Not Usually Used in the Progressive（Meaning） 26
Focus 5 States and Actions（Use） 28
Use Your English Activities 31
Unit3 Talking About the Future 34
Opening Task 34
Focus 1 Talking about the Future with Will and Be Going To（Meaning） 36
Focus 2 Will and Be Going To（Form） 37
Focus 3 Making Predictions：Will or Be Going To?（Use） 38
Focus 4 Future Plans and Intentions：Be Going To（Use） 39
Focus 5 Two More Uses of Will：Making Quick Decisions and Serious Promises（Use） 41
Use Your English Activities 44
Opening Task 48
Unit4 Asking Questions 48
Focus 1 Review of Yes/No Questions（Form/Meaning） 50
Focus 2 Review of Wh-Questions（Form/Meaning） 52
Focus 3 Wh-Questions That Focus on the Subject（Form/Meaning） 54
Focus 4 Wh-Questions with Rising Intonation：Checking Information（Use） 57
Focus 5 Choice Questions（Form/Meaning/Use） 58
Focus 6 Tag Question（Form/Meaning） 60
Focus 7 Tag Question Intonation（Use） 63
Use Your English Activities 66
Unit5 Modals of Probability and Possibility 70
Opening Task 70
Focus 1 Using Could，May，Might，and Must to Show How Certain You Are about a Present Situation（Meaning） 72
Focus 2 Modals of Probability and Possibility（Form） 74
Focus 3 Modals of Probability and Possibility in the Past（Form） 77
Focus 4 Modals of Probability and Possibility with the Progressive（Form） 79
Focus 5 Future Probability and Possibility with Modals（Meaning） 81
Use Your English Activities 84
Unit6 Past Progressive and Simple Past with Time Clauses 88
Opening Task 88
Focus 1 Past Progressive and Simple Past（Use） 90
Focus 2 Past Progressive（Form） 91
Focus 3 When，While，and As Soon As（Meaning） 92
Focus 4 Time clauses with When，While，As Soon As，Before，and After（Form） 94
Use Your English Activities 99
Opening Task 104
Unit7 Similarities and Differences 104
Focus 1 Expressing difference：Comparatives and Superlatives（Form/Meaning） 106
Focus 2 Similarity and Difference：As...As and Not As...As（Meaning） 107
Focus 3 Using As...As and Not As...As（Form） 110
Focus 4 Making Tactful Comparisons with As...As and Not As...As（Use） 113
Use Your English Activities 116
Unit8 Measure Words and Quantifiers 120
Opening Task 120
Focus 1 Measure Words With Food（Meaning） 122
Focus 2 Measure Words With Count and Noncount Nouns（Form） 125
Focus 3 Common quantifiers（Form/Meaning/Use） 129
Use Your English Activities 133
Unit9 Degree Complements 136
Opening Task 136
Focus 1 Enough，Not Enough，Too（Meaning） 138
Focus 2 Enough，Not Enough，Too（Form） 140
Focus 3 Too Much and Too Many；Too Little and Too Few（Form/Meaning） 142
Focus 4 Too versus Very（Meaning） 143
Use Your English Activities 146
Unit10 Giving Advice and Expressing Opinions 150
Opening Task 150
Focus 1 Giving Advice with Should，Ought To，Shouldn't（Form/Meaning） 152
Focus 2 Using Need To and Imperatives to Give Advice（Use） 153
Focus 3 Should and Ought To versus Must（Use） 154
Focus 4 Should and Ought To versus Had Better（Form/Meaning） 155
Focus 5 Should versus Could and Might（Use） 157
Focus 6 Should and Ought To versus Might，Could，Need To，Had Better，and Must（Use） 160
Focus 7 Expressing Opinions with Should，Ought To，and should Not（Meaning） 161
Use Your English Activities 162
Unit11 Modals of Necessity and Prohibition 166
Opening Task 166
Focus 1 Modals of Necessity，Prohibition，and Permission（Meaning） 168
Focus 2 Modals and Phrasal Modals：Must，Have To，and Have Got To（Form） 169
Focus 3 Have To versus Have Got To（Use） 172
Focus 4 Using Cannot（Can't）and Must Not（Mustn't）to Show Something Is Prohibited or Not Permitted（Meaning/Use） 173
Focus 5 Must and Have to versus Must Not，Cannot，and Do Not Have To（Meaning/Use） 175
Focus 6 Talking about the Present，Past，and Future with Have To and Must（Form） 178
Use Your English Activities 181
Unit12 Expressing Likes and Dislikes 184
Opening Task 184
Focus 1 Expressing Similarity with Too and Either（Form/Meaning） 186
Focus 2 Expressing Similarity with So and Neither（Form/Meaning） 186
Focus 3 Expressing Similarity with So（Form） 187
Focus 4 Showing Agreement with Short Phrases（Use） 188
Focus 5 Short Phrases or Hedges（Use） 190
Focus 6 Likes and Dislikes with Gerunds and Infinitives（Form/Meaning） 192
Use Your English Activities 193
Unit13 Present Perfect with Since and For 196
Opening Task 196
Focus 1 Present Perfect：Connectiong Past and Present（Use） 198
Focus 2 Forming the Present Perfect（Form） 200
Focus 3 For and Since（Meaning） 202
Focus 4 For and Since（Form） 203
Focus 5 Verbs Not Used with Present Perfect and For（Meaning） 204
Use Your English Activities 207
Unit14 Present Perfect and Simple Past 212
Opening Task 212
Focus 1 Present Perfect versus Simple Past（Use） 214
Focus 2 Ever and Never in Questions（Meaning） 217
Focus 3 Present Perfect in Questions（Use） 218
Focus 4 Already and Yet（Meaning） 219
Use Your English Activities 221
Opening Task 226
Unit15 Present Perfect Progressive 226
Focus 1 Present Perfect Progressive and Just：Recent Activities（Use） 228
Focus 2 Present Perfect Progressive（Form） 229
Focus 3 Perfect Progressive：Unfinished Actions（Use） 230
Focus 4 Present Perfect Progressive For New Habits（Use） 231
Focus 5 Present Perfect versus Present Perfect Progressive（Use） 232
Use Your English Activities 235
Unit16 Making Offers with Would You Like 238
Opening Task 238
Focus 1 Offers with Would You Like（Form） 240
Focus 2 Would You like...?or do You Want...?（Use） 240
Focus 3 Accepting and Refusing Offers（Use） 242
Use Your English Activities 245
Unit17 Requests and Permission 248
Opening Task 248
Focus 1 Making Polite Requests（Ues） 250
Focus 2 Politely Refusing Requests（Use） 251
Focus 3 Responding to Requests（Form/Meaning） 252
Focus 4 Asking for Permission（Use） 255
Focus 5 Responding to Requests For Permission（Form/Meaning） 256
Use Your English Activities 257
Unit18 Used To with Still and Anymore 262
Opening Task 262
Focus 1 Comparing Past and Present with Used To（Meaning） 264
Focus 2 Used To（Form） 265
Focus 3 Anymore（Use） 265
Focus 4 Still（Form/Meaning） 266
Focus 5 Adverbs of Frequency（Form） 268
Use Your English Activities 269
Unit19 Past Perfect 272
Opening Task 272
Focus 1 Past Perfect and Simple Past（Meaning） 274
Focus 2 Past Perfect（Form） 274
Focus 3 Before，After，By the Time，By（Meaning） 277
Focus 4 Past Perfect versus Present Perfect（Use） 278
Use Your English Activities 280
Opening Task 284
Unit20 Articles 284
Focus 1 Definite and Indefinite Articles：The，A/An，and Some（Form/Meaning） 286
Focus 2 Using Articles：First and Second Mention（Use） 287
Focus 3 Indefinite Articles with Singular，Plural，and Noncount Nouns（Form） 289
Focus 4 Some Instead of（No Article）（Meaning） 290
Focus 5 The with Singular，Plural，and Noncount Nouns（Form） 291
Focus 6 Making General Statement with（No Article）（Meaning） 292
Focus 7 The with Unique/Easily Identified Nouns（Meaning） 293
Focus 8 Using The：Second Mention，Related Mention，and Certain Adjectives（Meaning/Use） 295
Use Your English Activities 299
Unit21 Articles with Names of Places 302
Opening Task 302
Focus 1 Articles with Names of Places（Form） 304
Focus 2 Articles with Names of Institutions（Form） 307
Use Your English Activities 309
Unit22 The Passive 312
Opening Task 312
Focus 1 Passive and Active（Meaning） 314
Focus 2 Forming the Be Passive（Form） 315
Focus 3 The Passive（Use） 317
Focus 4 Including the Agent in Passive Sentences（Use） 318
Focus 5 Forming the Get-Passive（Form） 319
Focus 6 Be-Passive versus Get-Passive（Use） 322
Use Your English Activities 324
Opening Task 328
Unit23 Phrasal Verbs 328
Focus 1 Phrasal Verbs（Form） 330
Focus 2 When to Use Phrasal Verbs and How to Learn Them（Meaning/Use） 331
Focus 3 Phrasal Verbs that Take Objects（Form/Meaning） 333
Focus 4 Separating Verbs and Particles（Form） 335
Focus 5 Inseparable Phrasal Verbs（Form/Meaning） 336
Focus 6 When and When Not to Separate Phrasal Verbs（Use） 339
Focus 7 Phrasal Verbs that Do Not Take Objects（Form/Meaning） 341
Use Your English Activities 344
Unit24 Adjective Clauses and Participles as Adjectives 348
Opening Task 348
Focus 1 Adjective Clauses：Using Who and That to Describe People（Form/Meaning） 350
Focus 2 Which and That（Form/Meaning） 352
Focus 3 Participles as Adjectives（Form/Meaning） 355
Use Your English Activities 359
Unit25 Conditionals 362
Opening Task 362
Focus 1 Hypothetical Conditionals（Form/Meaning） 364
Focus 2 Word Order in Conditionals（Form） 366
Focus 3 Past Hypothetical Conditionals（Form/Meaning） 367
Focus 4 Future Conditionals（Form/Meaning） 371
Focus 5 Future Conditionals or Hypothetical Conditions?（Meaning） 373
Focus 6 Factual Conditionals（Form/Meaning） 375
Focus 7 Would，Might，May，and Will in Conditionals（Meaning） 376
Use Your English Activities 378