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A child that, who becomes
A child that becomes
A child who becomes
A child who, that becomes

Which is more appropriate and which ones are wrong if any?

The problem is not if they are interchangeable or not rather if I can use them both at the same time. My punctuation may be off, if you can correct that as well, I'll be happy.

  • I'm asking if they can both be used at the same time, not if they are interchangeable or not when to use which. – Işık Kaplan Feb 27 '18 at 13:56
  • If I'd noticed that, I'd have simply closevoted for lack of prior research. Whatever gave you the idea it might be possible to string together two relative pronouns like that? – FumbleFingers Feb 27 '18 at 14:01
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    Editing your question has not removed the duplication caused by the middle two suggestions. Asking about the grammaticality of the first and last suggestions is off-topic as being unresearched and too basic. – Edwin Ashworth Feb 27 '18 at 14:01

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