Jawaban:

1. (+) We have seen snow

  (-) We Haven't (have not) seen snow

  (?) Have we seen snow?

2.(+) I have met my people since i came here

  (-) I haven't (have not) met my people since i came here

  (?) Have I met my people since i came here?

3. (+) Our headmaster have closed the meeting

   (-) Our headmaster haven't ( have not) close the meeting

   (?) have our headmaster closed the meeting ?

4. (+) Miss Nova has explained that lesson for  two hours

   (-)Miss Nova hasn't ( has not) explained that lesson for  two hours

   (?) Has miss nova explained that lesson for  two hours ?

Selanjutnya Bisa Dikerjakan sendiri yaa, Agar dapat lebih paham. Good Luck!!

Keterangan:

Rumus Simple present tense : (+)Subject + Have/Has + Verb-3.

                                                   (-)Subject + Have/Has (not) + Verb-3.

                                                   (?) Has/have + subject + Verb 3.

Have untuk ( i,you,we,They)

Has untuk ( he,she, it)

Penjelasan: Semoga membantu, Thanks