Modals CAE Straight to advanced
I _______ (buy) bread but I didn't know we needed it. (past possibility)
could have bought
We _______ (invite) so many people to our party! I'm worried that we won't have enough room for everyone. (past negative advice / regret)
shouldn't have invited
I _______ (start) saving money years ago! (past advice / regret)
hould have started