Present perfect tense negative exercise - Tenses exercises

Complete the negative sentences with the correct present perfect form of the verbs.
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It has not affected our relationship in any way. (affect)
Yeah, well, of course, but you have never had your own account? (have)
However, despite the Group 's repeated requests, it has not received the list of these technicians. (receive)
Furthermore, the Greek Government has not shown why it might be absolutely impossible to proceed with recovery. (show)
The United States itself has not harmonised its legislation, for example. (harmonise)
If it 's true, how come you have not arrested this woman? (arrest)
Why is it you have not left ? (leave)
I have never known anyone like you. (know)
Boy, I have not seen you so excited about anything that was not flammable. (see)
I am surprised he has not transferred you, all the trouble you have drawn. (transfer)
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