she could use the Internet改为一般疑问句和肯定回答和否定回答？

she may know 改为一般疑问句，肯定回答和否定回答，否定句~

一般疑问句：May she know?
肯定回答： Yes, she can.
否定回答：No， she can't.
否定句： She may not know.

Can your mother play the piano？
肯定回答 Yes,she can.

否定回答 No,she can't.

Could she use the Internet？

肯定回答Yes,she could.

否定回答 No,she couldn't.

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