From grammar lessons, I’ve learned that the base format of “the test is not tomorrow” is
However, nobody speaks like this and the polite form should be
Or, more formally,
However, when I put the first two into google translate, it gives the correct translation of “the test is not tomorrow.” But when I put the last one in there, it gives “the test must be tomorrow,” which is 100% not what I’m trying to say. What’s wrong here?