Thank Horsa for your reply. And I have one more thing to ask:
Q1: Don't you want to lend me your pen?
A1a: Yes => mean what?
A1b: No => mean what?
Q2: You want lend me your pen, don't you?
A2a: Yes => mean what?
A2b: No => mean what?
Looking forward to seeing your advice.
Regards,
Phary