You have done much work on this new software project
Yes! Is correct sentence
The project is done.
No. "Can't" is present tense, "if" is future tense (as it makes it a question) and "Joe went" is actually past tense. A more correct phrasing would be "If Joe goes to Susan's party, he won't be able to get his project done."
The correct version is"What you have done is wrong". In this form, "What" stands for "The thing that". The alternative "What have you done"... is a question.
You could've done your project on the state of Utah.
No, it's, "I wouldn't have done that."
yes
No. Depending on the context of the sentence it should be If you have had a consultation or if you have done so, with consultation, blah blah
Yes. The correct way to say this is "you are done with this book."
it depends on what kind of sentence it's in.
The superfluous work had to be done even though we had already finished the project.
The project done by the student was copacetic to fetch him a B Tech degree.