I am go to work at seven o’clock every morning.
Two verbs cannot go together. So, I go to work at seven o’clock every morning.
My brother and I am both very busy today.
My brother and I are both very busy today.
Is Mr. Jones is at the park?
The verb cannot be repeated. So, Is Mr. Jones at the park?
Is you online in the class?
Nope, remember the person: Are you online in the class?
The students not at the library.
The students aren't/are not at the library.
Are they is at the movie theater?
Are they at the movie theater?
Where the post office is?
Where is the post office?
Mr. Paddington are from Peru.
Mr. Paddington is from Peru.