Present Simple
I do my homework
My homework is done
I'm doing my homework
My homework is being done
I have done my homework
My homework has been done
I did my homework
My homework was done
I had done my homework
My homework had been done
Tom brings the package.
The package is brought.
Tom is writing a letter now.
The letter is being written right now.
Tom has already brought the package.
The package has already been brought.
Tom brought the package a day ago.
The package was brought two days ago.
Tom had brought the package before you came.
The package had been brought before you came.