Question

but for this quickness i would have been killed ( had)​

Answer 1

Explanation:

but for the quickness I would have killed

Answer 2

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But for this quickness I would have been killed (add had)​

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But for this quickness I had have been killed.

★ More to know -

Simple Tense:: It is used for habitual or routine actions in the Present Tense, action which is over in the Past Tense & action to happen in the Future Tense.

According to the formation of the sentence, you have to change the auxillaries and the formation of the sentence will therefore differ.

Hope this helps uh! ♡