Hxen.com's tips：Every day persisted can learn English well!-->■Learn English Everyday■
collective noun – n. a word which refers to a collection of things taken as a whole.
auxiliary verb – n. a word used in construction with and preceding certain forms of other verbs, as infinitives or participles, to express distinctions of tense, aspect, mood, etc
modality– n. expressing ability, necessity, possibility, permission or obligation.
lexicographer – n. someone who writes dictionaries
inconsistency – n. the quality or fact of not staying the same at different times
exaggerate – v. to think of or describe something as larger or greater than it really is
