[Grammar] simple sentence

[Patronella]

simple sentence contains a subject and a predicate

 

[Rover_KE]

A simple sentence must also start with a capital letter and end with a punctuation mark, Patronella.

It's hard to believe you're an English teacher.

Why have you posted that?

 

[Tdol]

You can have a sentence with less than that- if you just have an imperative, there is not subject stated, though it is understood.