grammar – n. the set of rules that explain how words are used in a language
clause – n. grammar: a part of a sentence that has its own subject and verb
predicate – n. grammar: the part of a sentence that expresses what is said about the subject
complement – n. grammar: a word or group of words added to a sentence to make it complete
challenge – n. a difficult test or problem
complement – n. something that completes something else or makes it better
pattern – n. a repeated form or design
introduce – v. to use or make something available for the first time;
stylistic – adj. of or relating to a way of doing things
polite – adj. showing respect to others
formal – adj. of or related to serious of official speech