This is called the "predicate" and a sentence is not a sentence without one.
I will call is a verbal phrase from the verb "to call" - it is the first person future tense.Will + verb for the future is the same for all persons. So there is no need to call it first person future.
The noun or pronoun in a prepositional phrase is the object of a preposition.
Generally, the last word of a prepositional phrase is the "object of the preposition."
There is no special name for it, unless 'so' is at the end of a verb phrase, making it a phrasal verb.
That word is called a preposition. Prepositions are used to show the relationship between the noun or pronoun and other words in a sentence.
You call it a palindromic sentence. If it isn't a sentence it is a palindromic phrase or palindromic sequence.
alliteration
Grawlix plural: Grawlixes
I will call is a verbal phrase from the verb "to call" - it is the first person future tense.Will + verb for the future is the same for all persons. So there is no need to call it first person future.
The noun or pronoun in a prepositional phrase is the object of a preposition.
Generally, the last word of a prepositional phrase is the "object of the preposition."
Able was I ere I saw Elba --- I don't know what you call it though A pallindromic sentence .
To me, it's urgent that I answer this question forthwith. It's urgent that you return my call as soon as you get my message.
It is not a full sentence. It doesn't have a subject or verb. You would probably call it a prepositional phrase. They stepped into a world of unimagined complexity and beauty. ( subject = they, verb = stepped)
an exclamatory sentence
No, you have the verb incorrect. It should be "I don't know what KEEPS you so busy that you cannot pick UP my call"
There is no special name for it, unless 'so' is at the end of a verb phrase, making it a phrasal verb.