Functions 9 : Certainty / Uncertainty

Summary

I- Course

1-1/ Expressing certainty

1-2/ Expressing uncertainty

II- Practice 1

III- Practice 2

I- Course

1-1/ Expressing certainty

I'm sure / certain / positive that ........

Yes, definitely / certainly / of course.

There is no doubt .......

undoubtedly

It is crystal clear / obvious/ evident .........

No one can deny .........

I- Course

1-2/ Expressing uncertainty

I’m not sure...

1 doubt it.

1 don’t think / guess...

may

probably / possibly

It’s unlikely / doubtful that...

II- Practice 1

Express the same sentence in a different way :

1. I'm quite sure that many of us today can't live without a mobile.

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2. I don't think that robots will be able to replace human beings at work.

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III- Practice 2

What would you say in the following situations :

1. Your friend wants to know whether you can come to his birthday party tomorrow.

You (express certainty) :

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2. Your friend : Do you think humans will be able to live on the moon ?

You (express uncertainty) :

____________________________________________________________________________________________