I have to go to the library to read. What is a double negative instead of?

I must go to the library to read.

I can't help reading in the library.

Analysis: To change the original sentence into a double negative, just change "must" into "have to".

The role of double negation:

First, the affirmation and negation of meaning.

Double negation has certain expressive effect, but we should pay attention to the accuracy of the whole sentence when using double negation.

Second, the weight of timbre.

Generally speaking, double negation has a stronger positive tone and a stronger meaning than affirmative sentences.

Third, the role of rhetorical questions.

Double negation is often used with strong rhetorical questions to enhance the expression effect.