Grade 10 Grammar Lesson 13 Other future forms

What should the sentence structure be like when we talk about official arrangements, instructions and orders?
When do we use the future perfect tense?
What is the difference in use of ‘by’ and ‘in’?
When do we use the future perfect continuous tense?

Grade 10 Grammar Lesson 13 Other future forms (1)

  •  We use be + infinitive to talk about official arrangements, instructions and orders.
  • We don’t use this form for things that can’t be controlled by people. In such cases, we use will.
  •  We use the future perfect (will have done) to say that something will be completed or achieved by a particular point of time in the future.
  •  We often use in and by to show the time factor when we talk about things in the future perfect. We use in with period of time and by with point of time.
  •  We use the future perfect continuous (will have been doing) to say how long something has been going on by a point of time in the future. For this, we usually mention both the future point of time as well as the period of time (for.) until then.

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