The Four Corners curriculum is designed around a communicative methodology. While the Student’s Book provides the framework, the answer key serves several vital purposes:
| Unit | Topic | Tricky Exercise | Common Mistake | | :--- | :--- | :--- | :--- | | 2 | Present Perfect vs. Simple Past | "She ____ (live) in Tokyo for 5 years." | Writing "has lived" when the sentence includes a past time marker like "in 2019." | | 5 | Zero & First Conditionals | "If you heat ice, it ____ (melt)." | Writing "will melt" instead of "melts" (zero conditional fact). | | 7 | Passive Voice (Present) | "English ____ (speak) worldwide." | Forgetting the "be" verb: "English spoken" vs. "is spoken." | | 9 | Reported Speech | "He said, 'I am tired.'" → He said that he ____ tired. | Leaving the tense as "am" instead of changing to "was." | | 11 | Relative Clauses | "The man ____ car was stolen called the police." | Using "who" instead of "whose." | four corners 3 student book answer key
If you are a teacher, email Cambridge’s customer support. If you can prove you purchased the student book (receipt or photo), they may grant you access to the teacher’s resource pack. The Four Corners curriculum is designed around a
The "Student Book" comes with a self-study CD-ROM (older editions) or online access to Cambridge’s Digital Hub (newer editions). However, the print version does not include an answer key in the back—a deliberate pedagogical choice to prevent students from simply copying answers. | | 7 | Passive Voice (Present) |