CONDITIONALS

I got a bad mark in Maths. I haven't told my parents yet because I'm afraid they'll ground me.

I think obe of my friends suffers from bulling. How can I help her?

My sister always takes my clothes wothout asking me first.

I can't sleep because of my neighbour who play the cello untill 1 a.m.

Yesterday I saw my best friend's boyfriend kissing another girl. Should I tell her?

A group of girls troll me on Facebook. I don't know what to do.