Do you know when to use the future continuous (e.g. I'll be studying) and future perfect (e.g. I'll have studied)?

The future continuous (will be + ‘ing’ form) and the future perfect (will have + past participle) tenses are used to talk about events in the future.

Future continuous

  • Don’t ring at 8 o’clock. I’ll be watching Who Wants to be a Millionaire.
  • This time tomorrow we’ll be sitting on the beach. I can’t wait!

We use the future continuous to talk about something that will be in progress at or around a time in the future.

  • Don’t phone grandma now, she’ll be having dinner.
  • The kids are very quiet. They’ll be doing something wrong, I know it!

These sentences are not about the future but we can use the future continuous to talk about what we assume is happening at the moment.

Future Perfect

  • Do you think you will have finished it by next Thursday?
  • In 5 years time I’ll have finished university and I’ll be able to earn some money at last.

We use the future perfect to say that something will be finished by a particular time in the future.

We often use the future perfect with ‘by’ or ‘in

  • I think astronauts will have landed on Mars by the year 2020.
  • I’ll have finished in an hour and then you can use the computer.

By’ means ‘not later than a particular time’ and ‘in’ means 'within a period of time’. We don’t know exactly when something will finish.

  • I promise I’ll have done all the work by next Saturday.

We don’t know exactly when he will finish the work – maybe Thursday, maybe Friday – but definitely before Saturday. 


Language level

Upper intermediate: B2


can i say "I think Alex will leave the quiz?" it doesn't satisfy any parallelism. 'think' is in the present tense and 'will leave' is in future. Is there anything wrong in my judgment? Kindly correct me please

Hello wisefool,

Yes, that's a correctly formed sentence. It uses 'will' to make a prediction about the future.

All the best,
The LearnEnglish Team

Thank you, Kirk. Where can I find the topics on sentence structures?

Hello wisefool,

In our grammar section you can find a link to 'Clause, phrase and sentence'. Click on that and use the links on the right of the page to go to different aspects of the topic.


Best wishes,


The LearnEnglish Team

We usually say that many and much are used in negative sentences, even so , on the Cambridge dictionary there a lot of positive sentences about many such as There are too many people chasing too few jobs, Rachel was at the party with her many admirers.

And second question,
Could you explain me difference between a coffee and some coffee (e.g what is a coffee ? what is some coffee ) and some ice cream, an ice cream. P.S i know that they are countable and uncountable but i can not imagine them as a chocolate and some chocolate ...

Hi seaara,

The key word in your first question is 'usually'. When we analyse frequency we can see that 'much' and 'many' are used most often in negative sentences, but they can be and are used in affirmative sentences too and that is why examples of these are given.

The countable forms of the words you give are commonly bought or served units. So, if I say 'I have some coffee' then I mean the substance (beans, powder, liquid), but if I say 'I have a coffee' then I mean a cup of coffee. Similarly, an ice cream means one cone, for example, and a chocolate means one piece from a box.


Best wishes,


The LearnEnglish Team

Thank you very much!

Hello, Sir
I have read these example about the future perfect:
Three years from now we'll have been together for a decade.
In three years' time we'll have been together for a decade.
could please tell me what is the difference between them?
and according to use by and in
Can I say I will have finished my course in or by Monday
I mean Can I use in with days in the future perfect
and can I say I will have finished my course in the summer too I know we can say by the summer and can I use at too like in this example:
at the end of this course I will have known a lot about the future perfect.
Thank you, Sir

Hello sunrisereham,

'In three years' time' is less common in informal contexts, but otherwise there's no real difference in meaning between the first two sentences you ask about.

The preposition 'in' isn't used before the names of days of the week in general; when referring to time, 'by' means 'not later than' or 'at or before' – you can see some more example sentences of it with this meaning in the Cambridge Dictionary.

As for your last questions, 'by the summer' is a bit different to 'in the summer', as it specifies that you'll have finished before (or perhaps at the beginning of) the summer, whereas 'in' means sometime during the summer months. 'at' is OK in the sentence you ask about since the phrase after it already refers to the end of that time period, but 'by' is probably more common in that kind of context, i.e. with the future perfect.

All the best,
The LearnEnglish Team

Thank you, Sir