" You should've asked, I would've been, I would've been happy to do it" or " it's fine" , " 's fine" drop the " d" , drop the " it" , " 's fine" .

You should've asked, I would've been, I would've been happy to do it，或 it's fine，'s fine，把 d 省略了，把 it 省略了，'s fine。