My brother tried to tuach them,but my father warned him (-) (?) My father said it was against the rules (-) (?) Last,we observed natural gaes and oil (+) (?)

(-)My brother didn't try to tuach them,but my father -warned him
(?)Did My brother try to tuach them,but my father warned him?

(-)My father didn't say it was against the rules
(?)Did My father say it was against the rules?

(-)Last,we didn't observe natural gaes and oil
(?Did we observe natural gaes and oil last?

thanks for correcting