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GATE | GATE-CS-2014-(Set-3) | Question 2

  • Last Updated : 07 Nov, 2019

If she _______________ how to calibrate the instrument, she _______________ done the experiment.
(A) knows, will have
(B) knew, had
(C) had known, could have
(D) should have known, would have


Answer: (C)

Explanation: A)knows, will have //Present ,future

B)knew, had //past past

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c)had known, could have//past perfect,perfect conditional



D)should have known, would have //present,future

 

 

In a Type 3 conditional sentence, the tense in the ‘if’ clause is the past perfect, and the tense in the main clause is the perfect conditional or the perfect continuous conditional.

If clause (condition)Main clause (result)
If + past perfectperfect conditional or perfect continuous conditional
If this thing had happenedthat thing would have happened.

 

source: http://www.edufind.com/english-grammar/type-3-conditional/

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