Future Perfect and future continuos

The rain will have stopped by this afternoon.
Some people think that sea levels will have risen by as much as a metre in 50 years' time.
Laura won't have arrived before dinner, so I'll leave some food in the oven for her.
When will they have learned enough English to be able to communicate fluently?
Don't phone between 7.00 and 8.30, as we'll be having dinner then.
Good luck with your test tomorrow. I'll be thinking of you.
Will you be waiting for me when I get off the train?
This time tomorrow, I'll be sitting at a café, drinking a beer.
You don't need to get up early. We won't be leaving until about 9.30.
I'll be going to the supermarket later. Do you want anything?

Exercise a

The film starts at 7.00, but I won't arrive until 7.15. When I arrive at the cinema, the film will have started.

The flight to Geneva takes off at 9.00 and lands at 10.30. At 10.00 they'll be flying to Geneva.

I usually save US$ 200 a month. By the end of the year, I'll have saved US$ 2,400.

Rebeca leaves at 6.30. It takes her an hour to get to work. At 7.00 tomorrow, she'll be driving to work.

The meeting starts at 2.00 and finishes at 3.30. Don't call me at 2.30, because we'll be having a meeting.

Sam is paying for his car. The last payment is in May. By June, he'll have paid for his car.

Their last exams is on 31st May. By the end of May, they'll have finished their exams.

She writers a chapter of her novel a week. This week she's on chapter five. By the end of this week, she'll have written five chapters.

Sonia is usually at the gym between 6.30 and 7.30. There's no point phoning Sonia now. It's 7.00 and she'll be working at the gym.

Exercise b

Well, it looks like we'll be having very different weather in the future if climate change continues.

What do you mean?

Well, they say we’ll be having much higher temperatures here in London, as high as 40°.

And remember, we won’t be lying on the beach - we will be working in 40°, which is quite different.

And islands like the Maldives will have disappeared by 2100 because of the rise in the sea level.

They say the number of storms and tsunamis will have doubled by the middle of the century, too, so even more people will be moving to the cities by then.

Big cities will have grown even bigger by then.

Can you imagine the traffic?

I don’t think there will be a problem with the traffic.

Petrol will have run out completely by then anyway, so nobody will have a car.

Someone will have invented a new method of transport, so we will be getting around in flying taxis or something.

We use the future perfect to say something will be finished before a certain time in the future.

This tense is frequently used with the time expressions

by
Saturday
March
2030
etc

in two weeks
months
etc

By + a time expression = at the latest. With in, you can say in six months or in six months' time.

We form the negative with won't have + past participle, and make questions by inverting the subject and will / won't.

Future continuous

We use the future continuous to say that an action will be in progress at a certain time in the future.

Compare:

Come at around 7.30. We'll have dinner at 8.00. (= we will start dinner at 8.00)

and

Don't phone between 7.00 and 8.30, as we'll be having dinner. (= at 8.00 we will already have started having dinner)

We form the negative with won't be +berb + ing and make questions by inverting the subject and will / won't.

We sometimes use the future continuous, like the present continuous, to talk about things which are already planned or decided.

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