I was really busy today.
Suddenly, it got busy.
I didn’t feel like finishing my work, but I somehow managed to get it done.
Now I’m pretty tired.
If I were smarter, I would have finished sooner.
If I had studied harder, I would have finished earlier.
If I had worked harder, I could have bought a house.
Suddenly：突然に
smarter：もっと賢い
sooner：もっと早い
※erがつけば「もっと」が追加される。