前缀 un-

使用前缀 un- 来拼写单词并改变词义；理解 un- 可以表示相反的意思或 reversal（倒转动作）。

Spell words using the prefix un- to change meaning; understand that un- creates opposites or reverses actions

学习证据 / Evidence

• 正确拼写带有前缀 un- 的单词（如“unhappy”“unfair”“undo”）。
• 解释 un- 如何改变单词的意思。
• 通过在已知单词前加上 un- 来创造新词。

• Spell words with un- prefix correctly (e.g. 'unhappy', 'unfair', 'undo')
• Explain how un- changes the meaning of a word
• Create new words by adding un- to known words

评估问题 / Assessment

{{name}}是否知道在“happy”或“lock”这类单词前面加上“un-”会改变它的意思，并且能正确拼写这些单词吗？

Does {{name}} know that adding "un-" to the front of a word like "happy" or "lock" flips its meaning, and can they spell those words correctly?