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Canakc Posted 17 years ago
Grammar

What is the difference between these two ?

She could be sitting in the canteen.

Emre must know Istanbul very well.

where do i use modal/ be /ing combination and where do i use modal/be ??
  

Top answer

(be + present participle) I am sitting, I was sitting The simple modal is formed by the modal auxiliary + infinitive I might sit. I would sit. I must sit.

  • (be + present participle) I am sitting, I was sitting The simple modal is formed by the modal auxiliary + infinitive I might sit.
  • I would sit.
  • I must sit.
  • The modal (or future) form in the progressive is made from the modal auxiliary + be (infinitive) + present participle of the verb.
  • I might be sitting, I would be sitting, I will be sitting, I must be sitting...
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2 Answers
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Canakc

"be" is an auxiliary verb used to make the progressive tenses.(be + present participle)
I am sitting, I was sitting

The simple modal is formed by the modal auxiliary + infinitive

I might sit. I would sit. I must sit.
The modal (or future) form in the progressive is made from the modal auxiliary + be (infinitive) + present participle of the verb.
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canakcwhere do i use modal/ be /ing combination and where do i use modal/be ??
There is really no difference between the two. Wherever the version without a modal has am, is, or are, change it to be after a modal. It makes no difference if an -ing word follows; the -ing word won't change.

Tim is walking in

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