What are the function perfect tenses

i don't really love my math teacher

explanation:

and the reason being is because she get me in trouble for the smallest things that i really don't be doing all the time it be my friends that's around me.and i love to do things that other people but when she get on my nerves i don't talk to no one i just sit there and do my work half the time.

really not a paragraph just don't want to say a lot about her : )

the following key ideas correctly express the key sentence.

restate key idea: most people can learn to swim in ten short lessons.

restate key idea: the majority of water-accident victims require mouth-to-mouth breathing.

restate key idea: an empty, tightly closed gallon jug will support a tired swimmer.  

restate key idea: first aid is to prevent accidents as well as assist in rescue.

explanation: the key idea needs to have the same topic as the key sentence (drowning and safety).