词根与词形变化

识别常见的词根及其词形变化形式（如 look/looks/looked/looking），利用词缀作为理解词义的线索，并理解后缀如何构成名词和形容词。

Identify frequently occurring root words and their inflectional forms (e.g., look/looks/looked/looking), using affixes as clues to word meaning and understanding how suffixes create nouns and adjectives

学习证据 / Evidence

• 识别出 played、playing、player 中的词根是 play
• 解释 careful 中的 -ful 表示“充满……的”
• 使用 -ness 和 -er 从词根构成名词：sad → sadness，teach → teacher

• Identify 'play' as the root in 'played', 'playing', 'player'
• Explain that '-ful' in 'careful' means 'full of care'
• Use '-ness' and '-er' to form nouns from root words: 'sad → sadness', 'teach → teacher'

评估问题 / Assessment

当{{name}}看到 play、plays、played、playing 这类词时，是否理解它们都来自同一个词根，并能否正确使用每种形式？

When {{name}} sees words like "play," "plays," "played," and "playing," do they understand they all come from the same root word and can they use each form correctly?