Atype of non fiction which explains a particular subject is called what?

Tell whomever you meet about this new opportunity. the bolded words are what kind of clause?

The author most likely uses the word monstrous rather than the word “unpleasant” because it has a more positive connotation than the word “unpleasant.” a more negative connotation than the word “unpleasant.” a more neutral connotation than the word “unpleasant.” almost the same connotation as the word “unpleasant.”

Iwill have sailed around the world by the end of next year. what is the verb form in the sentence? future perfect past emphatic present progressive past perfect