Modals of Deduction

Must · Might · Can't · Deducing about present situations

About this worksheet

Exercises practising Modals of Deduction. Total: 16 points. Vocabulary from the B1 word bank is used throughout.

Type or tap your answers, then submit at the bottom to see your score and review.

Exercise 1

Choose the correct modal

8 points

She has won every competition this year. She must / can't / might be a very dedicated athlete.

He never recycles anything. He must / can't / might care much about the environment.

I am not sure where she is — she must / can't / might be at the departure lounge already.

That assignment is only two pages long. It must / can't / might have taken more than an hour to write.

The app has ten million downloads. It must / can't / might be very popular.

I haven't seen him all day — he could / must / can't be somewhere on campus.

She has been studying for twelve hours straight. She must / might / can't be exhausted.

A wildlife reserve that size must / might / can't be home to thousands of species.

Exercise 2

Write your own deductions

8 points

Write a sentence with must, might/could, or can't based on the evidence given.

The athlete has broken three world records this year.

He has never used a computer in his life.

I'm not sure if the lecture has started yet.

She scored 100% on every test this term.

Exercise 3 — Error Correction

Each sentence has exactly one error. Type the corrected sentence or the corrected word(s).

Find and correct the ONE error: "He must to be very tired after the long journey."

Find and correct the ONE error: "She can't be at home — I can see her in the park."

Find and correct the ONE error: "They should arrived by now."

Find and correct the ONE error: "It might not to rain this afternoon."

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