/ʃ/    for sheep

• This sound has a lot of different spellings.
• Spelt ‘sh’: shoe /ʃʊː /
• ‘ch’ like in the word ‘machine’ /mə’ʃiː n/
• -s, -ss like in: sure and passion /ʃʊə/ or  /ʃɔː /  /’pæʃən/
• -ti like in the word nation /ˈneɪʃən/
• -ci like in special /ˈspeʃəl/
• -ce like in ocean /əʊʃən/
• -si like in mansion /ˈmænʃən/

/tʃ/ for cheap

• This sound has a lot of different spellings.
• Spelt ch like chair /tʃeə/
• tch like in watch /wɒtʃ/
• -ti like in question /ˈkwestʃən/
• tu like in nature /ˈneɪtʃə/

Notice the difference between these pairs of words:

SHEEP/CHEAP – SHARE/CHAIR – NATION/NATURE – SHIP/CHIP