Future Perfect Tense

The future perfect is formed with 'will/won't + have + past participle'.
He will have left by the time you arrive.

We use the future perfect to talk about an action we expect to be completed by a time in the future.
By this time next year I'll have finished studying.
We usually use a time expression with the future perfect
soon, by then, by+date, in + date.
We'll have finished the project in time for the presentation.
It's a new job so call me next week. I'll have settled down by then.

Will for predictions

We use will+infinitive to make predictions about the future
They will win the championship.

Use adverbs of certainty (probably, possibly, definitely, certainly) to make the predictions stronger or weaker.
In affirmative sentences the adverbs come after will.
They will definitely win the championship.

In negative sentences the adverbs come before will not.
They probably won't do that well in the championship.

Lesson by Tristan, teacher at EC Malta English school

Now choose the correct phrases for the following:

• 1. I can't meet you tomorrow. I _ the project by then.
  
  won't have finished
  will not finish
  
  
• 2. I don't know if Sarah is coming to the concert. I _ to her tomorrow so I can ask her then.
  
  will probably speak
  will have spoken
  
  
• 3. I need to rent a car next week. Mine is being serviced and they _ working on it by then.
  
  won't have finished
  will not finish
  
  
• 4. I'm not sure what our plans are for the weekend but I _ by tomorrow.
  
  will know
  will have known
  
  
• 5. By next year the company _ itself as a market leader.
  
  will definately establish
  will have established