Use am with I, is with he/she/it and are with you/we/they. Use be to give a name, describe a person or say where someone is. Contractions include I'm, she's and they're.
See it in action
I am a student.
I + amShe is a teacher.
She + isThey are friends.
They + areYour turn: write two sentences using this pattern. Say them aloud and change one word to create a new sentence.