Open parts of speech include*

you can select more than one answer

 auxiliaries

 Adjectives

 articles

 verbs

 nouns

 complementizers

 negation

 conjunctions

Determiners in English include *

  verbs like help, play

 nouns like John

 articles like a, the

 demonstratives like this, that

 conjunctions like and, or

 adverbs like quickly, slowly

 negation like not

 modals like will, must