When we talk about yesterday, we cannot always use "ed" endings. Sometimes we change the words. The words see, come, run, and go change.
![bird](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL110Kids/unit03/Grammar%203-4/3-4g1.jpg)
Today I see three birds.
The birds come to my window every day.
![bird2](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL110Kids/unit03/Grammar%203-4/3-4g2.jpg)
Yesterday I saw one bird.
The bird came to my window yesterday.
![run](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL110Kids/unit03/Grammar%203-4/3-4g3.jpg)
I run every day.
I can go fast.
![run2](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL110Kids/unit03/Grammar%203-4/3-4g4.jpg)
Yesterday I ran to work.
I went very fast.