So I am referring to the different ways to say, “I must”, like ~ないといけない、~なければいけない, etc.
How do you guy figure out which one is the correct one for the answer? There are four different ways to combine the first and second halves, and it is a bit annoying to have to type out three nearly identical answers before getting the correct one when they are mean more or less the same and often the question giving no real clue of which one it is looking for?