1. When we come back from our honeymoon, the department store will have delivered the wedding presents.
a) has their wedding presents.
b) has a return date already.
That’s right! They know exactly when they are coming back, therefor they are absolutely sure about the store having delivered the presents.
Sorry! They do not have their presents since they haven´t even gone on holidays.
2. Peter loves to flight, in fact he is taking flying lessons. By now, he must have about 50 hours of flight in his record.
a) He finished his flying lessons.
b) So far he has 50 hours of practice.
Correct! The pilot today has approximately 50 hours of experience.
Nope! He hasn´t finished his flying lessons although he has 50 hours of practice already.
3. José Juan has been a Zumba instructor for years, but those days will be over soon. He will have started a new job by Monday.
At the moment of speaking...
a) José Juan is still a Zumba instructor.
b) José Juan has started his new job already.
Perfect! When they are talking, Monday hasn´t arrive and the Zumba class haven´t finished either. Therefor he is still an instructor.
Better luck next time! José Juan won´t start until the following Monday.
4. The end of the summer is coming when it finishes it will have left us great memories.
a) The summer has been delightful so far.
b) The summer is over.
Great! The summer hasn´t finished yet but the speaker has had great experiences already, as a consequence the speaker can say he will remember it gladly.
Incorrect! The summer isn´t over but it will very soon.