Jawaban:

1.(-) we are not eating meatball

(?) are we eating meatball?

2.(-) i am not washing a car

(?) am i washing a car?

3.(+) they are swimming in the river

(-) they are not swimming in the river

4.(+) Anton is studying english

(-) Anton is not studying english

5.(+) she is cooking Japanese food

(?) is she cooking japanese food?

6.(-) i am not wearing a traditional shirt

(?) am i wearing a traditional shirt?

7.(+) we are writing a novel

(-) we are not writing a novel

Penjelasan:

notes* Kalau Kata Introgative (?) Itu Di Akhir Kalimat Pake Tanda Tanya (?) Karena Itu Seperti Sedang Menanyakan Sesuatu. SEMOGA MEMBANTU :D