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Which one is correct? I have sent it or I have send it.
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Sent is the part participle of "send" and therefore used in the present perfect.
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I am wondering if you have sent it by post or e-mail.
Anonymous Which one is correct? I have sent it or I have send it.
"/i have sent it /" is correct because with perfect tense we use third form of verb/past participle

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Anonymous"/i have sent it /" is correct because with perfect tense we use third form of verb/past participle
Barbara did say that - five years ago.
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I had sent you an email

Anonymous Which one is correct? I have sent it or I have send it.

I have send it

No, no, no! Please read this thread for the correct answer and an explanation.

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