The turbine worked flawlessly, so the technicians ______ made a mistake during calibration.

The students didn’t understand the schematic. The lecturer ______ explained it more clearly.

The structure looks perfectly stable; the engineers ______ miscalculated the load capacity.

Past modal verbs COULD HAVE + III verb form and MIGHT HAVE + III verb form are exactly the same.

The data seems inconsistent. The software update ______ interfered with the readings.

Complete each sentence with the correct past modal form.

The final design Odpowiedź Pytanie 12  (approve) earlier to avoid delays.

Past modal verbs CAN'T HAVE + III verb form and COULDN'T HAVE + III verb form are exactly the same.

Past modal verb MIGHT HAVE + III verb form indicates likelihood in the past.

The past modal verb CAN'T HAVE + III verb form indicates prohibition/lack of permission in the past.

The engineer was absent yesterday; he ______ attended the safety briefing.