The key answer of exercise Grammar 1
The key to exercise solutions in chapter 06 - Language focus 1 for the textbook Cutting Edge Upper-Intermediate - Student's Book with authors Sarah Cunningham, Peter Moor and Jonathan Bygrave from Pearson Education
Question
Find an example in exercise 1b of the Past perfect, the Present perfect and the Future perfect. How is each tense formed?
Answer
Past perfect - formed with had + past participle
- had invented
- hadn't learnt
- had discovered
- hadn't arrived
- had been invented
- hadn't discovered
Present perfect - formed with have / has + past participle
- have landed
- haven't found
Future perfect - formed with will have + past participle
- will have sent
- won't have learnt