pliss tolong dijawab ya

1. (+) the teacher informs about the speaking contest.
(-) the teacher don't informs about the speaking contest.
(?) are the teacher informs about the speaking contest? / does the teacher informs about the speaking contest?

2. (+) the farmer cultivaties his rice field.
(-) the farmer don't cultivaties his rice field.
(?) are the farmer cultivaties his rice field? / does the farmer cultivaties his rice field?

3. (+) the students have an experiment in the field.
(-) the students haven't an experiment in the field.
(?) are the students have an experiment in the field? / do the students have an experiment in the field?

maaf kalau salah