English
Spelling & Word Study
Procedural
9–10 yrs
Suffixes (age 9+)
后缀（9岁以上）
Description
Spell words with Latin and French suffix patterns: endings sounding like /ʃəs/ spelt -cious or -tious (e.g., precious, cautious), /ʃəl/ spelt -cial or -tial (e.g., official, essential), and words ending in -ant/-ance/-ancy vs -ent/-ence/-ency (e.g., observant/observance, confident/confidence)
Mastery Evidence
- Apply the pattern that -cious follows a vowel (spacious, gracious) while -tious follows a consonant (cautious, ambitious), noting common exceptions like anxious
- Choose between -cial (usually after a vowel: special, official) and -tial (usually after a consonant: essential, partial) when spelling words with the /ʃəl/ ending
- Select -ant/-ance or -ent/-ence by checking whether the root ends in a hard c or g sound (-ant: significant) or a soft c or g sound (-ent: innocent), and by applying word-family strategies
Assessment Prompt
Can your child spell words with tricky endings like "-cious," "-tious," or "-cial" — for example, "precious," "cautious," or "official" — without making mistakes?
Prerequisites 1
Suffixes (age 7+)
拉丁语/法语后缀拼写规律（-cious/-tious、-cial/-tial、-ant/-ance/-ent/-ence）建立在Y3-4后缀学习内容的基础上
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