Past form means it happened in the past.
Breaking means it is happening now (present tense) and is incorrect.
Broken is an adjective not a verb and is therefore incorrect.
Broke is the correct choice because it is past tense. Think, if you said, "I broke the chair" it means you broke it in the past, not in the present or future.
Breaked is not a word.
Answer:
I was/is Anton's car, I saw him driving the car yesterday.
Answer:
A dog is a animal and it is also one kind of best friend of people.
The correct sentence is John attended Sunset Elementary School and graduated from Sunrise High School in May of 1980.
Hope this is what you were looking for!