ばか！バカ！　馬鹿ー月！

If you don't stop trying to kill me, I will kill you.

If I turn into a Loli, I will murder you like a Loli.

If you try to murder me like a loli, I will kill you. First.

If you kill me, then I will kill you. (Isn't this boring?)

If TLMS doesn't get translated faster, I will kill you.

何？あなたは小説であることを私に教えていない場合、私はあなたを殺すでしょう。

I actually tried reading that.... but I am to lazy to read it. I am curious of what is written because my japanese sucks and I need to exert some amount of force to actually read it. and I am too lazy to google translate so yeah...
If you try and annoy me again, I will kill you

If you say that, I will kill you. (Yoshino!!!!!!!!!!!!!!!!!!!!!!!!!!!!)

If I am lazy and don't finish it on time, I will kill you.

Finish what on time?
If you don't tell me what a tsundere is, I will not kill you but slap you across the face until you tell. Then when you tell me, kill you.

I was supposed to help someone write an essay, but I'm lazy.
If you don't realize that Google-sensei can tell you what a tsundere is, I will kill you.

If you don't realise I know all the dere types and that I am a kuudere, I will Dalek you to death. (Exterminate! sshkshk!)

If you don't realize that it is counterproductive to ask something you know, I will kill you.

If you do not play Perfect Cherry Blossom, I will kill you.

If you don't realize that I have no idea what that is, I will kill you.