Have help, as in I have help from my friends when I need a boost, is a predicate consisting of the verb have and the noun help.
Have helped, as in I have helped the teacher clean the blackboards, is a verb phrase consisting of the helping verb have and the past participle helped.
An adverb
i need help
pronoun
The word 'can' is an auxiliary verb. The complete verb is 'can help'. (You can help me...)
part of speech
The part of speech for this particular word is a noun.
The term for knowing a word's part of speech in order to appropriately use it in a sentence is "word-usage."
The part of speech for "answer" is a noun.
adverb
what part of speech is beneath
chose the right words to describe the product
The part of speech for "explicit" is an adjective.