General Linguistics

Theory, Model, Method
Phonetics and Phonology
Morphology
Syntax
Semantics
Pragmatics

Selected Subfields

History of English
Syntactic Theory
Cognitive Approaches
Language and Media
Sociolinguistics
Theories and Methods in Linguistics

Solution

Negation, Task 3

In contemporary English, negation is always expressed with an auxiliary verb which is the verb "do" in most cases (except for there is an auxiliary verb in the positive sentence).