英语单词前后缀及词根.docVIP

Prefix-Suffix-Root List by Grade Level Draft for Teacher Review 2009-2010 The following lists are not all-inclusive, but most common. They are a minimum students at each grade level should read and understand how to use and apply by the current school year end. Others may be added based on your classroom of students. Prefix - A word part added to the beginning of a root or base word to create a new meaning, Suffix - A letter or a group of letters added to the end of a root or base word to change its meaning, Root - the form of a word after all affixes are removed (Generally, prefixes and suffixes change the meanings of roots, but it is usually the suffix that denotes the part of speech.) Incorporate prefix, suffix, and roots into working with words study. 1st Grade Prefix Suffix Definition Examples -s, -es plural, more than one hats, pigs, books, plays, boxes, wishes, dishes cliffs, roofs, beliefs knives, leaves, halves, selves -ing action/process helping, skipping, running, seeing, thinking -ed past tense jumped, helped 2nd Grade Prefix Suffix Definition Examples un- not/opposite unlock, unsafe, uncover re- again/back reread, rewrite, return cycl- circle,wheel bicycle -er person connected with, comparative degree teacher, writer, baker, bigger, colder, taller -est superlative degree biggest, coldest, tallest -ful full of beautiful, painful -less without careless, helpless -cian/-ist one who musician/artist 3rd Grade Prefix Suffix Root Definition Examples in- not inactive, income im- not impossible, improper, import auto- self automobile dis- not/opposite of dislike, distrust, disagree pre- before pretest, preplan, premade pro- before proceed post- after postgraduate tele- far, distant telephone, telegraph, television dic- say/speak distation bio life biology, biography, biopsy -ies plural, more than one parties, babies, cries -ied past tense cried, tried, -ed past tense stopping, hopping -ing