The perfect tenses: Forms and uses — Exercise 1

1By this time next month, we — choose —completewill have completedwill have been completing the entire research project.

2She — choose —has finishedhad finishedwill have finished three reports already, so she can leave early.

3By the time the guests arrived, we — choose —had preparedhave preparedwere preparing dinner.

4They — choose —have livedhad livedwill have lived in Singapore for over ten years before moving to Canada.

5I — choose —have readhad readwill have read this book before, so I already know the ending.

6By 2035, scientists — choose —will makewill have madehave made significant advances in renewable energy storage.

7She was exhausted because she — choose —had been workinghas workedwill have worked all night.

8By the end of this week, I — choose —will have workedhave workedhad worked at the company for exactly five years.

9We — choose —didn't reviewhaven't reviewedhadn't reviewed the proposal yet, so we can't make a final decision.

10When I finally found my passport, I realised I — choose —had lefthave leftwill have left it in my desk drawer all along.