tolong yang jago bahasa inggris nomer 3

1. (+) the teacher explains english
(-) the teacher doesn't explain english
(?) does the teacher explain english?

2. (+) the teacher explained english
(-) the teacher didn't explain english
(?) did the teacher explain english?

3. (+) the teacher has already explained english
(-) the teacher hasn't explained english yet
(?) has the teacher explained english?

*maaf kalau salah