Phonics Digraphs: sh, ch, th, oo 雙字母音
BasicTwo letters, one sound: sh, ch, th, oo — the keys to longer words.
- Digraph: two letters, one sound — sh, ch, th, oo.
- Tongue out for th; long and short oo.
- Circle digraphs first, then blend the rest.
文體小知識：Phonics 進階——兩個字母合作發一個音：sh、ch、th、oo。會了 digraphs，長少少的字都讀得到。
§Text Passage
1Last year you learned single letter sounds. This year: digraphs — two letters working together to make one new sound. sh: ship, shop, fish — put your finger on your lips and feel the air. ch: chair, cheese, lunch — like the start of 'choose'.
2th has two versions: voiced th (this, that — tongue between teeth, vibrating) and voiceless th (three, thank — tongue between teeth, blowing, no vibration). Both need your tongue out — that is the th sign. oo also has two versions: long oo (moon, food — round lips) and short oo (book, look — quick and short).
3Blend them: sh-o-p → shop; ch-ai-r → chair; th-r-ee → three; b-oo-k → book. When you see a new word, find the digraphs first (two letters, one team), then blend the rest. Digraphs are the keys that open longer words — from three-letter words to five-letter words.
1Summary 重點摘要
Two letters, one sound: sh, ch, th, oo — the keys to longer words.
2Vocabulary cards Vocabulary
Two letters making one sound.
A big boat; starts with sh.
A seat; starts with ch.
The number 3; voiceless th.
This one; voiced th.
The moon; long oo.
A book; short oo.
The midday meal.
3Step by step Steps
- Step 1: sh — the quiet signsh sounds like asking for silence: ship, shop, fish, dish. Put a finger on your lips and feel the air.
- Step 2: ch — the munch soundch sounds like the start of 'choose': chair, cheese, lunch, church. Compare ship vs chip — one digraph, different meanings.
- Step 3: th — tongue outVoiceless th: three, thank, tooth. Voiced th: this, that, mother. Both need your tongue out.
- Step 4: oo — long and shortLong oo: moon, food, zoo. Short oo: book, look, good. Same letters, different sounds.
- Step 5: Circle digraphs firstFor longer words, circle the digraph teams first: ch-ai-r → chair. Digraphs count as one sound.
- Step 6: Compare pairsship/chip, three/free, moon/look — one digraph changes everything. Read the pairs aloud.
5Worked example Example
Sample: read the long word 'toothbrush' with the digraph strategy.
- Step 1: Circle the digraphs — th, oo and sh are teams of two.
- Step 2: Split — tooth + brush, two parts.
- Step 3: Blend each part — tooth (long oo), brush (br-u-sh).
- Step 4: Join — tooth + brush = toothbrush! The long word becomes short.
- Answer: Strategy: circle the digraph teams → split into parts → blend each part → join. Find the digraph partners first, then blend the rest — any long word becomes easy.
6Common mistakes Mistakes
7Quick check Quick check
Q1What is a digraph?
Q2What differs between ship and chip?
Q3What does your tongue do for three?
Q4How do moon and book differ?
Q5How to split toothbrush?
8Recap Recap
- Digraph: two letters, one sound — sh, ch, th, oo.
- Tongue out for th; long and short oo.
- Circle digraphs first, then blend the rest.
- Compare: ship/chip, moon/book.
- Split long words: tooth + brush.