Answer — Exercise 9.4
Unit 9 - Present perfect continuous·English Grammar in Use
Câu hỏi
Put the verb into the present continuous (am/is/are + -ing) or present perfect continuous (have/has been + -ing).
Câu trả lời
- Maria has been learning
- I've been looking
- are you looking
- She has been teaching
- I've been thinking
- he's working
- She's been working
- you're driving
- has been travelling