Must is unusual in its negation: must not still expresses a definite certainty or requirement. Need and have to, on the other hand, are negated in the usual manner. Compare: You must not read that book. (It is necessary that you not read that book.) You need not read that book. / You do not have to read that book. (It is not necessary that you In the bool query, we have the following fields: must. must_not. should. filter. Must is analogous to the boolean AND, must_not is analogous to the boolean NOT, and should is roughly equivalent to the boolean OR. Note that should isn't exactly like a boolean OR, but we can use it to that effect. And we'll take a look at filter later on. What do you have to do and what are you not allowed to do? Fill in must or mustn't. Choose from the drop down menu and form sentences you might hear from your parents and teachers. Do you need help? must, have to, mustn't, needn't. You . tidy up your room. You . smoke i have elasticsearch 6.8.8, just for an example of my question. I want to create a query that gets me document with "Test" field with value "1", and i don't want to get "Test" field with value of "3", i know that i could write just the first expression without 3 and it will give me one document with value of "1". While questions with "must" are grammatically correct, it is more usual nowadays to use "have to" for questions. There is no past form of must for obligation: We had to show our passports at the border. We weren't allowed to use calculators in the exam. Or, we couldn't use calculators in the exam. If the main clause has an auxiliary verb (including a 'modal' auxiliary verb like can, must), the question tag has the same auxiliary. If the main clause has be, this is also used in the question tag. If the main clause does not have an auxiliary verb (or be), do is used in the question-tag. Your example matches 1, so It must be her car, mustn Power and Politics. "We need to make sure that the violence must stop. Indeed, again, the cycle of violence is not helping Israel's long-term security and we need to make sure that the way that FbvQ.

use of must and must not