This cheese tastes like it has gone offbad.

He called to tell us that he was depressived.

We instantly dioved in to help him with urgent matters that he could not take care off.

She still wants to get you back at you for what you did to her last week.

This cheese tastes like it has gone off.

I'm pretty sure this sentence is correct, but I just wanted to add that I don't really hear people saying that food has gone off (although Google said it's a phrase)... we usually say something tastes off or it's gone bad

We instantly dived in to help with urgent matters that he could not take care off.