Build Past Deductions and Questions

Tap the words in the correct order to build each past deduction, prohibition, or natural question. Use must have or can’t have with past participles. One word does not belong.

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Question 1

Build the deduction: _____

Options: rains, The ground is wet; it must have rained overnight.

Question 2

Build the deduction: _____

Options: Leo is sunburned; he must have stayed outside too long., stay

Question 3

Build the deduction: _____

Options: ate, The cake is gone; the guests must have eaten it.

Question 4

Build the deduction: _____

Options: Ava was abroad, so she can't have attended the meeting., attend

Question 5

Build the deduction: _____

Options: has, The project began yesterday; they can't have finished it already.

Question 6

Build the deduction: _____

Options: The door was locked inside; Sam can't have entered that way., entering

Question 7

Build the prohibition: _____

Options: operates, You mustn't operate the machine without a supervisor.

Question 8

Build the deduction: _____

Options: Ben can't have emailed the form; the inbox is still empty., has

Question 9

Build the question: _____

Options: taking, Do you think Maya has taken the wrong train?

Question 10

Build the question: _____

Options: Could they have forgotten the appointment?, forgot

Practise Build Past Deductions and Questions with this interactive sentence-building exercise of 10 questions. Tap the words into the correct order to build each sentence, then submit to check your answers and get instant feedback on every sentence.

Practising grammar in real sentences — rather than memorising rules in isolation — is one of the most effective ways to make a structure stick. You can retry as many times as you like to build accuracy and confidence using Build Past Deductions and Questions in everyday English.