A complete sentence needs to make sense.
The predicate of a sentence must agree with the subject.
Use am, is, and was with singular subjects (just one).
![grammar1](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit05/Grammar%205-5/5-5g1.jpg)
The dog is gone.
![grammar2](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit05/Grammar%205-5/5-5g2.jpg)
I am happy today.
![grammar3](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit05/Grammar%205-5/5-5g3.jpg)
The panda was tired and sleepy.
Use are and were with plural subjects (more than one).
![grammar4](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit05/Grammar%205-5/5-5g4.jpg)
The giraffes are hungry.
![grammar5](https://smrt.sfo2.cdn.digitaloceanspaces.com/core/LMLA/KIDS/ENGL120Kids/unit05/Grammar%205-5/5-5g5.jpg)
We were playing in the rain.