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Help the confused IT support technician figure out what happened to a client's laptop. Select the correct option for each blank.
"First of all, what _________________________ the keyboard to catch fire?
Secondly, which mysterious file ___________________________ right before the disaster?"
caused did you download
Subject vs. Object Questions:
In the first sentence, "What" acts as the subject (the thing causing the fire), so no auxiliary did is needed. We just use the past tense verb: What caused...
In the second sentence, "you" is the subject doing the downloading, making "which mysterious file" the object. Because we are asking about the object, we need the auxiliary verb did before the subject: ...did you download?
MediumB1 | IntermediateQuestionsInterrogative sentence or clauseSubjectObjectWord orderEnglish Grammar BasicsHumor
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