tolong kasih tau buat kalimat negatif (-) dan tanya (?)

3.
(?) is Dayu's mother in Posyandu now?
(-) Dayu's mother isn't in Posyandu now

4.
(?) Can Edo come to the study-group work?

5.
(?) Can Lina come to the phone?

6.
(?) Does beny look very serious?
(-) Beny doesn't look very serious

7.
(?) Is Dayu surprised?
(-) Dayu isn't surprised

8.
(?) is everybody having lunch in the canteen now?