1. Will Mary come to see you tomorrow ? {won't}
⇒ Mary will come to see you tomorrow, won't she?
(Trong câu hỏi đuôi, vế đầu là khẳng định thì vế sau là phủ định).
2. Let's collect unused clothes for the victims of the nature disaster? {should}
⇒ I suggest (that) we should collect unused clothes for the victims of the natural disaster.
(suggest + (that) + sb + (should) V)