Question

if you _____ careful the milk would not have spoiled over your shirt​

Answer 1

Answer:

Had Been

Explanation:

If you had  been careful the milk would not have spoiled over the shirt. Here, This is the conditional structure of the sentence which is as follows

If + Subject + Past Perfect , Subject + would have/would have not + Verb(3rd form) + object

for example- If Indian cricket team had played poor cricket , the team  would not have won the match.

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