It's not my fault.

it's Contraction

— The contraction of "it is". Bring you coat. It's raining. "Where's the book?" "It's on the teacher's desk." "What's that?" "This? It's just a piece of paper." — The contraction of "it has". It's been a long time since I've had cake.

not Adverb

— "Not" makes the verb of a sentence have the opposite meaning. I was not there. I am not fat!

not Conjunction

— The item before "not" is more correct or better than the item after "not". I wanted tea, not coffee! Meaning: I wanted tea. I did not want coffee. It's stupid, not funny. Meaning: It is stupid. It is not funny.

not Interjection

— Used to indicate the sentence before is sarcastic or ironic. This means that the sentence has the opposite meaning. I like doing lots of boring homework. Not! Meaning: I do not like doing lots of boring homework.

my Pronoun

— My things are things that belong to me. Is this my book, or is it yours?

fault Noun

— If something is your fault, you did something wrong or didn't do something right. It doesn't matter whose fault it is, let's work together to make it right. I'm sorry. It's my fault. I forgot to turn it off. It's clear that both sides are at fault. — A fault is a problem or a mistake. We found a few faults in the plan, but we'll fix them later. — A fault in your character is something about you that is not nice or good. The other girls thought that her only fault was that she was really stupid. — A fault is a long crack in the earth. The earthquake occurred near the San Andreas fault. — In sports like tennis or volleyball, a fault is hitting the ball in the wrong way, or to or from the wrong place.

fault Verb

— If you fault somebody for something bad, you say they did something wrong or didn't do something right. You can't fault him for not knowing about the change.